WebAfrica steeling my money - note getting the fibre speed I pay for!!

So I have a 20/2mb fibre line, it was upgraded for free by WebAfrica due to COVID to a 50/4mb speed and ran till end of June 2020. I then get a mail from them say if I want to stay on the current speed i can upgrade which I did & got confirmation that it was done and the monthly amount gets deducted for the 50/4 mb monthly. Here is where the bad bit starts since August 2020 my speed is running at 20/2 mb but I pay for 50/4 mb, as I am typing I am holding on to to be transfered to be assisted after I tried the Whatapp and called the sales already 2 time - I am waiting already 12 minutes to be assisted. It is the most pathetic service ever experienced and on top of that my money are being ****** by them for services not being provided.