very angry client

Good day My name is Nelisiwe Buthelezi. I am one sad and frustrated foschini customer that has a problem with the store itself. Two months back (February) i went to pay my account in one of the stores in Daveyton that work along with Foschini group. Much, to my suprise i was made aware that my balance is 10 000.....i immediately asked the teller (cashier) to print out the statement for me, and that is when i noticed that a purchase of an amount of R3999 was made from American Swiss, and again R3168 at Lakeside mall in September 2017. I then went to open a case in Benoni Police Station. Made a statement, and sent through all the relevent papers to Foschini. The treatment i got from Foschini makes me angry and an unhappy client, simply because in their findings they just say i am liable for those purchases where else in American swiss they cannot even find my card number for that day.....no, constant commucation i got from them. I feel that no proper investigation is made from Foschini, and they just jump to conclude and say i am liable for those purchases, of which i never even set foot on those two stores (ie. American Swiss and Markhams). They just tell me that i am liable without giving the proper evidence that made them to reach that conclusion. I need them to show me the duplicates of the receipts/invoice that has my signature, 2....they must take out their CCTV footage and show me entering their stores. I am constantly going to the stores to gain more evidence to prove my innocence, and it is really taking a tall on me as its costing me even emotionall and petrolwise. May i please be assisted to prove my innocence in all this dilemma. I am one sad and unhappy client....I refuse to be held liable for something i did not do..............please assist me this is really affecting my life