Telkom is the worst mobile service provider

The Worst, I have worked for Telkom / Openserve for over 10 years, and when I left in 2020, I closed all the contracts that I had with them, and a month ago, I get a letter from P&P Attorney's saying I owe Telkom over R6320 rand in unpaid account fees. I have not received a single letter, notification via SMS, or any other form of contact. When I called Tekom Customer Service, I spoke to Moshe from the Call center and he advised me, that I owe Telkom nothing. I asked him to send me an email confirmation, till this day, I'm still waiting for that mail and P&P Attorneys keep harassing me for money that I apparently owe Telkom,

Telkom Is the Worst in Service, Customer Service, Service Delivery, I am surprised Telkom is still in existence, as when I worked for them, they only cared about the numbers we had to push, they could care less about customer service or customer-centricity. I will recommend, to whoever has a contract or cell phone contract, with them, to close it as soon as it's expired, cause they will wait two years after you've closed your contract to get lawyers to call you, to say, you still owe them almost R10 000 in unpaid account fees, and in that two years, they will not send you any notification that you owe them money. I think this is now another strategy of Telkom making money from their clients they lost due to their poor service delivery