Constant collection calls

I lost my job in 2012 and informed African bank and made arrangement to pay R100 to each account monthly. Since last month I am getting about 2 calls a week wanting to know why am I not paying and when will I pay again even though I have paid. On the 26th of Feb I received the same call, told them I will pay before the 7th as I always do. The following week I receive another call, and this has been the case every week. <br> <br> I do not understand if I need to rob a bank in order to pay them or to commit suicide in order for them to understand the frustration they put me under. The other day their consultant even asked me if since 2012 I have not gotten a job insinuating that I am just sitting and not looking for a job. <br> <br> I owe you, I agree but I am making the effort to pay monthly, is that not enough. The reason I am writing is that I have received this call again.