Overcharge Complaint

I have a massive problem with MWEB accounts department. I have now been on the phone twice to them, at a total of 48 minutes and neither person knew how to sort out my query, let alone understand what i was trying to tell them about being overcharged to the tune of R878! I have upgraded to fibre from LTE on the 5 May 2021, and since then i am being charged for both services including a pro-rated amount for the fibre. I was even asked if i am sure i don't have both, really! I went onto their website as instructed on the phone call and left three messages and 4 days later no one has bothered to reply to me. I have asked that someone call me urgently to advise when i can expect a refund. I even mentioned that If i go into overdraft because of this, I will definitely be claiming any costs back from MWEB. As a last resort i messaged to say that if this isn't sorted out ASAP then I was going to take it to Hello Peter and social media! Not even this got them into any sort of action. Sandra Gail Dand ***. MWEB account number ***1