poor service

firstly the call center takes forever to answer calls and when they do they have the audacity to hang up on you. I have had two call center agents hang up on me in a matter of minutes apart. Their billing system is a pure ****, its unbelievable how much electricity one has to buy 1. I do not have a lot of appliances and I am hardly home the whole day. 2. I decided to increase my top up as a result of running low before month end and that was no use as I am still running low. I asked one of the call center agents to explain the billing system to me and it made no sense as the amounts do not tie up, I seriously need explanation why because this is day light *******.