Payday loan default

HI I had 3 payday loan s in 2007 & 2008. I made a few payments on all of them and then could not continue. I tried to make payment arrangements but they all refused. I have not paid on these loans since 2007 & 2008 and now all of a sudden, I have been sent emails by all 3 of them stating how things are past due, that one of them sold my account, and asking for payments. Should I respond via email? I know the statute of limitations is running out on the 2007 loan, but not until Thanksgiving. Is there a reason why all of a sudden all 3 companies would email me at the same time?