Gmac financial services - www.gmacfs.com
I bought a car that was financed through gmac. When I sent them a large payment I called to see how it could be posted. I was told that it would have to be posted as payments and they could not post it to princible because of finance charges.
Well I was told by there supervisor I was paid all the way up to february of 2008. Now I am getting collection calls everyday that they have not received my payments. No duh I am supposed to be paid for 5 months. Turns out they posted it to princible after all and now refuse to fix it. They have dinged my credit with late payment report to the credit bureau's and I don't have the money to pay them.
I have been on the phone with them at least three times a week for a month now and they still won't fix their screw up. No matter what you do when you buy a car if they tell you gmac took your loan run away they don't help your credit they ruin it.