Bad after care service on Fibre

I have been a Vodacom customer for more than 20 years. I have 9 contracts with them and then Fibre. I have raised a service ticket (SR***) with them on the 17th of July 2024 regarding the speed I receive from them. I am supposed to get 400Mbps. On 5G I get 80 Mbps and on 2.4G I get 20Mbps and most of the time it goes lower to 5Mbps. It is now the 26th of August 2024 and absolutely nothing has changed. I phone them regularly to follow up, and the only updates I get are the ones I give to them. Every time I phone the call centre, they tell me that they will escalate and that they will copy their supervisor and manager and the supervisor or manager will get back to me in 24Hrs. Not once have a I received a message or call or email from them. The technical staff from Vodacom communicates with me via Whatsapp, they will give me feedback if and when I request feedback and then it is a pretty standard answer - they are waiting for Metro. Vodacom blames Metro and Metro blames Vodacom. In the mean time I am expected to pay the bill, otherwise they will cut off my fibre, but the issue does not get resolved. I want to cancel my contracts, but then I have to pay penalties. How do we get this fixed?