Telkom Is Billing Me For A Contract I Cancelled in 2017 & Still Refusing to Cancel Contract

Telkom has been debiting my account for a contract I cancelled in 2017, yet they continue to debit my account every month & they still refuse to cancel & refund me. I have sent them multiple communication, including proof of the cancellation form in 2017 with e-mail correspondence with their call centre agent since 2017. They keep closing the calls i log with no feedback to me. Even when I go to their store the store refers me to the very same call centre & tells me there's nothing they can do. They refuse to give me an escalation point as they say this is not allowed. They also use hellopeter as their escalation & referred me there several times telling me there's a person assigned to hellopeter who will address my query. What kind of service is this? Telkom should be held accountable for this shoddy service & the theft of my money over the past 8 years. I wonder how many other people they're doing this to. Nobody has the time & energy to chase telkom all these years to do the right thing, but now I've decided I'm going to take them on using any and every platform i can access because their silliness and arrogance is just unacceptable