Mweb sucks at everything!

I have tried many times to sort out the problem with below average fibre speed. I pay for 300MBS but recieve about 80 on average. Today I phoned to cancel my account with them. On the first hold I had to wait 38 minutes for them to answer, then I was transferred to cancelations and this is where their worst service begins. I waited about 40 minutes for them to answer, but nothing. I tried 3 more times to different departments but after 2 and half hours of frustration I finally gave up. There is also no link or choice on the app or website to cancel an account, just to upgrade or downgrade. I hate Mweb after 2 years of frustration!!!! The worst network, service and call centre ever.