Worst network, bad customer service

I have never been so stressed out, I have paid up my account with vodacom after being harrased continuously by agents calling me everyday saying that I have not paid up my account. I have explained over and over and running around paying them 20 Rands that they have being asking for. This network is by far one of the worst networks. I have requested for my paid up letter multiple times and still I have not received it at all. I need someone that can understand me and assist me with my paid up letter asap. I can't do anything as this is affecting my credit score. This has been a bad experience and won't recommend this network to any of my friend and family