No Help With Fibre/Wifi & No Feedback

On Friday morning (28 May 2021) I reported that I had no internet connection to the fibre support customer care. It is now Saturday (5 June 2021). It has been over a week that I have been paying for wifi that I do not have! There is no such thing as feedback. I have phoned again and again. Sent over 12 emails. I use my WiFi /internet for work. I work for a university and even had to cancel a zoom meeting with scientists in Germany as a result of this atrocious service. I have had promises of having the problem escalated (only when I phoned), promises of a technician being sent to sort the problem out but NOTHING. I am now utterly desperate. I can't get to someone with some authority because I am constantly being blocked. Everytime I have phoned the consultant has promised to phone back, even a manager was supposed to phone back but not once has this happened. If there is anyone out there who can help, please, please please let me know. I have hit a brick wall.