Bad connection and service

My fibre keeps losing connection 10 times a day disconnects and connects after 2 sec. my wife works from home and every time this happens she needs to re-connect to her work server and redo everything she just lost. I am not happy I cancelled 2 weeks ago and they phoned me to try and keep me as a customer. I was promised this will be sorted 2 weeks later and nothing was done. All they want to do is phone and do test's.. send a technician from Afrihost and vumatel and fix this Ticket ID: EPV-***0