Bad Service and communication

Mweb has very bad service. I opened an account by them in December. It took almost a month for them to submit it to openserve, thus after phoning them multiple times to enquire. Once it was submitted I waited till in early Feb to have to phone again and enquire about installation dates etc. Apparently openserve had also made a mistake as they have an active address on the same address. Okay so that's fine I understand and ask them to please let openserve know about the problem. A week goes by and no feedback. On top of this I am being billed for a service that isn't even installed. I decided to cancel after all the struggle. I'm told that it's fine and all billing will be sorted out. I've been trying for a week to phone them everyday to finalise everything and everytime my call is terminated while I'm waiting to be put through to someone who can help me or there is no answer. I've used more airtime almost than my monthly subscription sorting this out.