If something is not done ,I will take this further

I always seem to have issues with African Bank, nothing is ever done about it , but now I have honestly really had it. And if this harassing does not stop I will find out about my legal grounds and take this matter further. I keep receiving smses to make payment and i am aware that i have not done so. But when the smses become harassing that someone will be sent to my place of work , that is a bit much and annoying , I am not sure how many times I am supposed to explain to this call centre that I have stopped working. my calls from December 2015 will prove that, the bank account proves that, I am highly annoyed, how does African Bank train their staff, I call the collections department this morning following the sms to again let the lady know my situation and to let her know i will be making payment this weekend. She is rude , downright rude, half asleep and not helpful whatsoever. If this situation is not corrected and i do not receive feedback and fast , I am taking this further. She didn't bother to ask for my ID number or anything.