Vodacom giving me a 20Mbps speed charging me every month R748.84 for a 50 Mbps fibre speed since February 2024

Vodacom giving me a 20Mbps speed line and charging me every month R748.84 for a 50 Mbps fibre speed since February 2024. Completed speed tests and getting 22.24Mbps download speed. The line is also very unstable and goes offline daily and in the evenings. Called Vodacom and asked for assistance, while on the line with them my fibre line was going offline, then online again, then offline again. Vodacom engineer did come to to attend to service request ***-089656 last week and advised the line is very unstable and also advised I am only getting a speed of 20Mbps download and advised I call fibre support to resolve. I have been paying my Vodacom fibre bill every month and getting little or no connectivity as well as getting a slow speed. Now another call has been logged reference SR*** and now I am still waiting for this issue to be resolved. I have been having these issues since February 2024 - Going on 3 months now. I am not happy with the poor service and connectivity I am getting from Vodacom. I rate Vodacom Fibre 1 star for the service I am getting as the length of time it takes to resolve their issues.