Terrible Vodacom business wireless service

About a year ago I installed the Vodacom Business wireless service at my home in order to be able to work from home.

I opted for the 20Mbps option.

All was well until 16th April 2021, when I began experiencing significantly reduced upload and download speeds (down to less than 1Mbps) with intermittent total loss of service.

I contacted the call centre several times with no improvement.

They sent out a technician 2 weeks later who changed the position of my receiver, replaced it with a far more expensive satellite type dish (an unnecessary cost to Vodacom) and still no improvement.

I also contacted the Vodacom store where I signed the contract. They tried to assist by contacting the relevant department, but still no improvement.

It has now been more than 4 weeks and the situation is becoming exceedingly frustrating.

It seems that I have no recourse for the lack of service.