Pro rata non sense

I have been paying the required pro rata amount only for my dstv to be disconnected after 5 days where another pro rata amount is required and after paying this my dstv is reconnected and then disconnected again after 5 days where another amount is requested to be paid. This has been going on for the past 3 weeks. I have contacted the call centre and I am getting no help I'm just told to pay the required amounts to keep my services connected. I have been a premium customer for years and never encountered this nonsense. Why am I not given one pro rata amount to pay? Why do I have to pay for my dstv subscription 5 days at a time and I pay reconnection fees all the time? I don't even get a warning message on my decoder that I have an outstanding amount I have to check on the site. What's this?