Disappointed at the service received

I upgraded my service about three weeks ago. On the day of the upgrade, there was no communication from the company, so I called to find out what was happening. Only then did I receive an update. The following week, I was told that delivery was in progress, but when the courier contacted me, they said my details were incorrect and couldn't complete the delivery. They instructed me to contact Telkom to resolve the issue. When I called Telkom, I was informed that I needed to visit a store. However, upon calling again, I was told that all my details were correct on their end, leaving me confused about the problem. Consequently, the package was returned to Telkom by the courier for resubmission. For the past three weeks, I have been querying this every day, sent out 19 emails, visited a store, and made numerous calls. All they keep saying is that the issue has been escalated. I’ve requested to speak to managers and for them to call me back, but I've received no response. Having been a loyal customer for many years, this level of service is very disappointing.