express credit auto and their finance company all of them oklahoma city Oklahoma

i have had problems.they never told me about a 1099-c i did a voluntary -repo.i was trying to trade my car off the pay off would be 8900.00.the dealer ship told me there was way to much negitive equity that the car was only worth 2500.00.so thats when i gave the car back to express credit auto i couldn't afford it anymore.they send me a paper a month after i gave the car back saying we will be selling your car and we will send you a copy of the bill of sale.well i never got that since it's been april 2014 and its feb.2015.so thats wheni got this 1099-c they put the intrest included saying i owe almost 14,000.00 and they sold the car for 5000.00.so i went there yesterday gave me the run around about this bill of sale

i had to call their financing and she tells me on the phone she cant give it to me she has to ask her superviser actually she wrote the person and it can take over 2 weeks.and all the reveiws that i have been reading i beleive they are fraudulant company and would make up a bill of sale.and i was looking at other stories and there is alot of us that they supposiedely sold their cars for 5000.00 also.how can this company get away with this i beleive the I.R.S. really needs to do their home work on this company.i cant beleive they have been getting away with this for so long.they have poor cutomer service.they onlytime they are nive to you is when you are buyinga car from them because they know the are ripping you.but once you have problems forget about it they treat you like crap and you are nothing  to them