Terrible Service, Slow Line Speeds & Line Dropping

I've been asking for help since November last year with a slow line and the line dropping with my fibre. I haven't gotten even near the line speed I've been meant to. I have received 0 feedback on over 10 tickets opened, various WhatsApp chats, and requesting to cancel. I now have to wait a full calendar month despite my numerous attempts to cancel. More money wasted. No feedback or call backs. No attemps to rectify. Really bad service overall.