Who am I talking to?

Company/Individual reported: Portfolio Recovery, others won't tell me

All of a sudden late last year, I started getting phone calls looking for a (example) Cynthia. I 'had' several credit cards over 8 years ago just in case of an emergency. I canceled them out, never using them (I think I would remember if I did). I've been disabled and on Social Security for 16 years now. I received two copies of my credit report a long time ago which I called the Credit Card companies to notify them of fraudulent activity, someone used my name for credit and have my name as owning businesses. Which I contacted each credit card company and straightened out. That was over 7-8 years ago and at the time, I was homeless and living in a tent and on a friends couch! I’ve moved 6 times since then and a friend took me in because I can only afford to pay $200.oo for rent! (I can’t get any other assistance except Food Stamps - due to standing up to our State Senator, of course there’s no justice and lies prevail, so I lost.
At first I was telling ‘everyone’, politely, they had the wrong person because they were asking for someone that had my first name and old name and since I straightened things out with everyone and I know I don’t owe anyone anything, it couldn’t possible be me.
Portfolio Recovery must have called everyone with my old last name until they reached my mother, that lives in another State and gave them my number and new last name! Now everyone that used to call with my old last name are using my new last name!
Portfolio Recovery along with other people, start calling me and their machines 8 am - sometimes 9 pm Mon-Sun. Most will only give me 'their' name but not their company and I won't say who "I" am or admit they are talking to me. One man kept using my name... "Cynthia, just admit Cynthia that you are Cynthia and I'll answer you Cynthia." He talked this way with 'every' sentence.
I tell (who ever) DO NOT call this number before 10 am or after 4 pm, or on Sat or GOD'S day (Sunday) but they do. Due to one of my disabilities, (PTSD) I have panic attacks (I tell them but they'll just wait until I'm done or listen to my T.V), I freeze up and literally can't hang up or have to pick up the receiver and hang it up immediately (I've actually did this to people I know). I see a Psychologist to help me through some calls I've had.
I asked one guy "Where are you calling from?" Meaning the company/business and he gave me a City and State, refusing to give me the company/business name until I told them who I was.
I have been blamed for so many things in my life that others did (family also doing this to me) so I'm actually 'scared' that someone is blaming me for something else.
I received a letter from one place saying I owed over $17,000.oo.... That's twice what I get in a year! So someone did something... I can't do confrontations due to having sever attacks, some have actually gotten to heart attack mode and had to have EMT's and others help me get breathing and calm.
So my questions are:
1. Do I 'have to' tell them they 'are' talking to me or ‘tell’ them my name when they refuse to tell me the company/business they are calling from?
2. When they’re told the hours and days to call, can they ignore it?
3. How many times a day can they call? Even if they get my machine, I answer or answer and hang up? Even after telling them they have the wrong person?
4. How many times a week can they call?
5. I’ve heard a silent ‘beep’ in the back ground while talking to a man and when I asked what the beeping was, he told me he was recording our call! Can they record you and not tell you?
6. I hooked up a tape recorder and have recorded some calls. One was just this past Sunday in which I told “Sue”: “Do you know the time is 5:19 p.m. and that the date is February 15th, which is Sunday?” “Sue” said she knows the date and time and it being Sunday. My caller I.D. shows she was from Portfolio Recovery which I have already recorded telling them “NEVER” to call on Sunday that it is “GOD’S day!” What good is recording them? What do I do with it?

I copied the “Script” I found on this site to make it easier for me told ‘talk’ to these people, Portfolio Recovery, Bank Services, and others I have no clue who they are because only a phone number shows on my caller I.D. and when I Google the numbers, it doesn’t always tell me.
Everyday I’m in extreme pain and when they call when I am, I lash out because I can’t deal with the pain ‘and’ them.
Someone please help me with these answers because I can’t take much more of having to bite my tongue.