Theft and Deceit by Webafrica

On 2 January I discovered Webafrica has been taking R699 instead of the agreed R530, due to their migration from Cell C to Telkom as their LTE service provider. They say they sent an email. I say I didn't agree or respond. They should've called and the email was not clear to YOU WILL PAY MORE. Webafrica won't return this money they took without permission.i since asked to be reduced to a lesser plan in line with the prev. Price. So far this process has cost me -numerous hours on the phone and WhatsApp with them. -3 weeks without internet, - lost in service, _ different internet - R1100 (excl airtime and my time) I was granted a refund for R499 of that, which was granted on 19th feb, only to find they now put it towards my March bill but I have cancelled their lousy service, and I have to wait another 48 h for this meager portion. I also have to return the router or face penality but they can't give me date of by when.