Worse Consumer Experience

In 2012 I had an account with Lewis store then in 2015 i lost my job then couldn't pay the account any more then i was advised by the store to pay R400.00 that was in 2016 so that the insurance can settle the account of which I did. Then late 2018 I did Credit check to my surprise i found out that im now have two accounts with Lewis Stores owing R10424. 00 on each which I know nothing off, I then contacted the Lewis Stores head office and I was informed my name does not appear on the system which is the same story i received at Lewis Sebokeng branch, I was then given some 083 number which the call center agent alleged it was of a law firm, I didn't contact the number as i believed Lewis is a big company to be using law firms with no landlines I'm so disappointed