Accelerit Fibre Provider - Worst customer service and internet Speed. Pay for 20MB but only receive 5MB or Less

I live in Midrand and moved into a new complex last year November. I have been paying for Fibre since December 2020. My contract is for 20MB up and 20MB down. I have never experienced 20MB download speed. When the technician installed it, it was at 10MB and he told me that it will come right the next day. However I never experienced 20MB download speeds. I have made numerous calls and logged complaints, speeds go up to 8 the most, and right now my download speed is sitting at 1MB. Accelerit blames celerity network, however Accelerit lacks consumer service. I have to constantly call them as they refuse to return my calls. This has been affecting my working capabilities as we are working from. The technical manager Dorcus never takes my calls, and when I do call her team always answers and when they hear who it is, they say she's busy on a call and will call back in a few minutes. She takes 3-5 days to return my call, with no solutions. I was told that they will hold my next payment invoice, which they did not honour. It is more than a month now that I requested a refund or getting better network speeds, more than a month later it is still under investigation. Please avoid Accelerit Fibre providers at all costs.