Bad service

I previously mentioned a compliant on behalf of my fathers vodacom account, which was immediately seen to after 2 years of calling, liaising with customer services, etc. however it is the same issue with my boyfriends vodacom account. He has being paying his monthly account promptly, however his account is reflecting a balance due. There is no customer service regarding this, and now his SIM card does not work. It is very poor service for the 3rd time