Disgusting service

I went into Telkom Table Bay Mall in November requesting my land line and ADSL to be cancelled on 1 Dec 2020. I went in again on 4Dec because I was still receiving daily internet usage emails. They had not cancelled the line as requested and logged another request and gave me 2 numbers if I was billed in December and that Ild come back and they will apply for a refund. Today I went back and a trainee told me I was billed because I only cancelled Dec. I explained that I had been in to request cancellation in November and that they didn't do it. He took my phone no and said someone would phone me in 10 mins. I am still waiting. I have tried to call the call centre but the line cuts off all the time. I am at my wit's end I am getting disgusting service. I emailed them to phone me which they did then when I answered the line cut off. I was going to take out a contract for fibre but I am seriously reconsidering it