Poor Service and ******* Charges

I have been an ABSA customer since 2007. So far I have not had any issues until recently. I received emails and phone calls from a debt collection lawyers claiming I had an outstanding balance on my account. Firstly I have NEVER been contacted by ABSA regarding this. I then went to an ABSA branch to complain and ask that my card be unlinked. I was told I had to get a new card. I have just seen that i have been charged R140 for this!