BEST BUY / HSBC credit protection lawsuit Internet

I bought two tv's from Best buy and my latest one was a 36 months same as cash/ signed the paperwork, then setup autopay of the balance divided by 33 months. Then after 30 months decided i wanted to buy laptop and put on same as cashs, but found i have been charged over 500 in credit protection that i never signed up for,Spent hours trying to get thru and was transfered to several departments and was discounted everytime when i was getting thru to the credit proptection department. how can you be charged for something that you don't need or want and try to cancel but are denied. NEVER BUY BEST BUY