There is no words to describe Supersonic

I am so feedup with Supersonic, I have been with them since 2020, they've been great in the beginning but now they just don't give a **** about their CLIENTS! I've been emailing them since April 2024 and it's July and no one gets back to you. You receive your tax invoice religiously monthly but they can't can't answer your emails. I just found out they have been over charging me since I joined 2020, when I logged into my account I saw my up and down speed 25Mbps is R399 but I have been paying R645!!! Now recently they announced that the 25Mbps is discontinued and they will be switching us over to 50 Mbps and charging us R729 without me agreeing too it. On their website they still have the 25Mbps available but it's discontinued, and their Whatsapp consultants advise you to log into your account to make changes to your plan. Every month Supersonic debits my bank account with R729 but every month I have an outstanding balance of R84, go figure? I am unable to change back to the 25Mbps or cancel it. I have contacted their Call Centre 0861 787 377 on numerous occasions but no one answers, I don't know how you supposed to be assisted if no one answers your emails or their phones. To date Supersonic have over charged me with R8856! Please Supersonic get back to me and let me know when you will be refunding me with my overpayment!