MWEB STOLE FROM ME

I have been with Mweb for over a year now. recently I moved and requested that they reinstall my wifi to my new residence. I was charged a fee for this installation which was all good and well. After struggling with different agents for a few weeks, each time having to explain the situation, they messed up and created 2 accounts for me which was was being charged on. After struggling again for weeks to get my money back, they finally rectified this and reimbursed me for the full month due to their mistake. During this process, I requested to be put on a different wifi package and was told that the amount for the new package(R699) would be deducted in the new month. I was then debited R1172. I called again and spoke to 8 different agents, each of them not knowing what to do and putting me through to different departments. I was now told that this amount is the R699 that was agreed upon plus half of the previous month. This was never discussed. I am being charged an additional amount because someone messed up somewhere along the line and they refuse to give my money back to me. I was never told about this cost and nevertheless it defeats the whole purpose of me being reimbursed for their mess up. None of their agents know what to do and whenever I call they put me through to a different person. Terrible client service and unfair charges.