Mweb Fibre

I have been trying to resolve my fibre issue with MWEB with no luck. There phone system doesn't work, I had a chat with an online agent giving me no update which is unprofessional.

I am paying for a 300MB line and have this line for over 2 years now. Over the weekend something went wrong, some configuration took my line to a 30MB line. This is unacceptable as I am trying to get MWEB to resolve this. This is not a cable or device issue which I mentioned several times before, I am getting the same download speed 30MB from wifi and cable. Can someone pls escalate this ?