Complaint Review: GMAC Insurance

i had already sent my next payment in prior to the due date. after sending payment i found insurance for almost half of what i was being currently charged so i purchased and cancelled my policy with GMAC. they did not send me back my payment and when i called they upped what they were originally charging me for my policy. i had sent in $87.00 for my next payment and cancelled before it was due and they sent me back a check for $10.98. and when i called the stated i was being charged some 274.00 for 60 days coverage when my entire policy for 6 months was around 500.00. i woulod advice people not to buy GMAC insurance or to deal with Superior Insurance in statesville, NC either. they charged me a 30.00 service charge to change cars, twice. i had thought it was an increase in my policy only to find out they were charging me a service charge. there are way too many honest companies to deal with so stay away from these people.