Telkom billed me after cancellation and refuses to refund me

Upon cancelling services with Telkom in Feb 2020, I have a cancellation reference received via email for this. I cut up the sim end of Feb 2020. To my surprise I received an invoice for April 2020 recurring monthly fees. When I enquired Telkom via email a consultant rep**** that my account was still active and he gave me instructions on how to cancel online. I responded that I will not cancel a service twice and provided my cancellation reference number from Feb 2020. The consultant never got back to me. 15 May 2020 : Telkom debited my account with an amount that is 5 times more the Recurring fees invoice that I was disputing with them. I sent an email enquiring why they have debited me after I showed them proof of my cancellation, there was no response. I went to the Fourways store with hope of receiving a resolution as I will be dealing with humans directly instead of digitally. Yes that is what Telkom has subjected its self to as an ICT business in times of 4IR. Technology does not seem to be their strongest point. The lady at the store stated she can see my cancellation with the reference I provided but my account is still active. She further stated the only thing she can do is escalate the cancellation on her side and request a refund. 18 May, does Telkom not debit my account again with the same amount debited on the 15 May. I sent another email, because I am not about to risk my life and continuously be visiting a store during a pandemic. It's been a solo battle where I have been asking Telkom how they can bill for a service that is meant to be cancelled. Telkom does not respond to my emails, phone calls are a nightmare where you hold on for 30 minutes plus waiting for someone to answer. I wrote to them on Twitter and Instagram and they blatantly just ignored me. Telkom service is appalling. And the transactions made to my bank account are a despicable crime. 20 May 2020, I received SMS feedback on the refund case I logged at the Fourways store. The SMS states that my case has been resolved, there is no refund because I was using the services. Irate and frustrated, I send another email within the same mail chain that I have been communicating to Telkom on with no response; quoting the SMS where Telkom is refusing to refund my money that has been debited twice in a space of 2 days. I further requested an itemised billing invoice showing the usage as I know that I have cut up the SIM card. There should not be any usage. Also I am baffled why I have to request an itemised bill because I usually receive one before Telkom transacts on my bank account. It is extremely annoying, Telkom has been unconcerned with my matter. Telkom does not care about its customer. They do not even pick up their phones. They think that it is okay to merely respond via sms stating NO REFUND. Telkom does not have their customers interests at heart. You treat customers like they are not paying for a service. This is my hard earned money and I will not let this go. If it means writing to ICASA and opening up a case of ***** with the Police then so be it. I am gathering all the evidence I need in writing with the email trail and the several platforms I have reached out to Telkom on.