African Bank is abusing me as a Client

My account was originally in arrears and I paid R15000 in November 2015 because I was informed at the branch that these were the balance of the arrears. In January 2016 I received a call from African Bank that I qualify for a R17 000 loan as my accounts are up to date. I declined the loan and later I got an sms saying that my account has a payment holiday and I must activate it at the branch, which I did. I was informed that the next premium will be on the 25/02/15. I then started getting calls from African Bank Collections department telling me that my account is in arrears. I queried this and they promised to get back to me but nothing happening. They kept on harassing me for the whole of February and I told them I am not in arrears. They promised to recalculate the account and get back to me and they never did. They then sent an sms that they are going to deduct 966 to help clear the arrears which I declined to on the call I had with Kgabo Sedibana. They deduct this money without authorization yesterday. I do not appreciate African Bank's tactics and underhanded dealings. How does one qualify for a loan and payment holiday while in arrears? I need this to be fixed urgently