Always billing on estimated meter readings

I'm shocked at the level of service provided by City of Tshwane Municipality. Almost every second or third month they bill our account based on estimates. This has being happening ever since I opened my municipal account with them as from 2013 to date. I brought this to their attention and no one seems to care enough to resolve this issue. The last time they estimated our municipal bill especially the electricity, I also estimated the payment. I was punished for not paying the full estimated amount and they went to an extent of switching off my water and lights. It took them almost a day and half to restore water and lights even after payment. I feel we are given a raw deal as customers simply because we have no other choice but to be stuck with a Municipality that is proving a pathetic service. I went to their customer service centre and that was the worst experience ever as those Frontline staff doesn't even show empathy and willingness to serve customers. I can only make one conclusion about them, they are in the wrong job.....I need to pay for services received not estimated figures. This unjust move messes up one's budget! I hope someone will do something about this...