Exhausting service

I had a rental land line with Telkom but due to Covid 19, our business was closed down so I couldn't pay anymore. I took the liberty of going to their store at The Reds Mall in Centurion and explained my situation to them and asked if I can cancel it and pay the remaining balance. The balance was R500 and odd rand, I waited for 15 to 20 minutes with the consultant busy working on his computer and was told that it was cancelled but I had to pay the remaining balance. To my surprise I kept getting sms'ses that my account is in arrears with more money added on. I called their customer care number and was told that I needed to send a request in writing which I did. I only received feedback after 7 days and was told that I used the wrong email and given another one. I used the one provided and after a week again I was told No you used the wrong email address. And they gave the same email address that I initially used the first time and I still forwarded the request. Even today they still didn't cancel it. Now they have handed my account over the attorneys and I owe R1,600. I'm exhausted so I just let it be and wait for them to call me. I am not going to pay that amount until I'm assured that the service is terminated.