Upgrade Line Issues - Not relecting

I upgraded my Wifi package from a 20/2Mbps to a 100/100Mbps on the 11/08/22 with my ISP who is Telkom. The line was upgraded the following day on the 12/08/22. Since then I have been struggling to get assistance as the line speed has not changed at all. I have called Telkom a number of times and followed their instructions of switching the router off, the Vumatel box as well as doing speed tests. and each reference number given has been closed as if rectified. This after a technician from Vumatel was supposed to come and check my line. To date, no one has called me to arrange to come to my home. Yet I am very quickly debited for the new amount for a service I am not receiving. To say the word 'service' is an understatement - all my ref numbers closed as if resolved. Ref numbers received from Telkom are ISP-852872, ISP-858472, ISP-865984 and ISP872031. The worst is, is that Vumatel does not have a client contact number to call directly, you have to go via your ISP - I mean really???? If this is not resolved, I will be cancelling my contract quite soon and look for a reputable and trustworthy fibre company who treats their clients with decency.