POOR SERVICE MWEB - OVERCHARGING A CUSTOMER CONTINUOUSLY

I changed to Fibre in November 2019 at a cost of R549 per month. I received a contract from MWeb stating that the monthly amount would be R549 per month (bear in mind this is a legal contract they emailed to me). I was charged R649 for December, January and now February again. Despite numerous phone calls to Mweb and reference numbers : MWB***5 and MWB*** this problem is still to be sorted out. When I first phoned in January a lady by the name of Wheeda Philander phoned me back and told me that I would get a credit passed on my February invoice. I have now received my February statement and no credits have been passed. I tried to contact Wheeda Philander again and left messages for her or someone else to phone or email me to let me know when this will be sorted out. I think this is very poor service as they are incorrectly charging me and this is not legal as they supp**** me with a legal contract which says I will be charged R549 a month and they are now over charging me every month. All they can tell me is that for some reason the computer is overcharging me. How ridiculous is this. Despite requesting that someone phone me or email me, I am still waiting. VERY POOR SERVICE MWEB.