Harrassed by Pinnacle

I have a time share and fell behind 2 payments just after the holidays. In April, I owed $670 which I paid on April 7, 2010. After I made the payment, Pinnacle reps Yolanda Thomas called and told my wife we owe $1419.00. This is for reconnection fees and late fees. We called our time share customer care and finance institution holding the note and we were told we were all caught up on payments. For the past month, Pinnacle has been calling demanding we pay them fees for their service. We asked for amounts and reasons for fees and they became argumentative. One time when I asked for an amount on what fee I owed them, I was told it was non of my business. My wife asked to speak to a supervisor and was told the person she just spoke to is the supervisor and there is no one higher than her in the office. This person is Dee Roth. What can I do to stop these harrassing phone calls for more money since the finance institution and the time share customer care folks say our account is current? Who in Pinnacle can I speak to or write to? I am sure the phone calls were recorded and I would love for the powers to be at Pinnacle could listen to the recordings and see how Yolanda Thomas and Dee Roth are treating people.
Thanks