Terrible network reception and service!

I have been a client of Rain SA for over a year (if not almost 2 years now), I have to say I am one very unhappy client. I have the worst network signal ever, almost on a monthly basis and when I call them I'm always put through to one of their call centre agents whom there's communication issues due to language barrier. I have rebooted my router more than multiple time with the instruction of their agents, nothing improves, my email is full of their ticket numbers which till this day I am struggling. Can there be a permanent solution to this issue or else I am migrating to another provider because this is terrible. On most days I can only enjoy TV only after 10pm and yet every month I pay fully and on time!