FNB WORKERS WORKING WITH **********!

My account is on R-300 but my account keeps purchasing at some toll gate,i went to the branch to close the card but the transactions keep going through,last month FNB took about R1500 from my account because it was on negative because of these transactions,i was patient for more that 7-10 working days but still im not getting any response,I think this is people working on the inside,it looks like an inside job,why would transactions go off on a negative account?? So if you dont want to be de*****ed by your own bank,i suggest you stay as far away from FNB!!!!