MWEB Pay more for less

i upgraded my internet line to 200mb over a month ago. The fiber line was upgraded but since day 1 it has reached maximum 40 mb . I have repeatedly called the technical support and outlaid additional costs with new cables and configuring routers at their request. Ive been waiting for 3 weeks for Vumatel to come out to resolve the issue with no response. Each call back to the call center is met with the same response that the matter has been escalated but nothing happens . The only thing that seems to be working is the billing which goes off like clock work.