Amature - no help - take your money and run

I have had bad service from Afrihost for the past 2 years. I have an router and simcard with them, supposedly supplying uncapped wifi with them at home. I pay close to R1000.00 per month for this, and it has NEVER worked properly. My signal drops completely, and 1 minute later starts up again. It does not help, I have already been thrown out of a Teams meeting, your stream has already been interrrupted. I have done all they asked of me, moved the router to every room in my 4 bedroom house - does not work. It is NOT the internet speed, it just keeps dropping the signal completely and then picking it up again to full signal. But dropping it every 3 minutes, NOBODY can work with that?? They ask me to connect lan cables, to investigate and see what is happening with this and that. WHY? Why do I pay them R1000 per month for internet that does not work and they refuse to do a damn thing about? They keep saying after 500 calls, we will escalate, we will escalate, all they escalate is my blood pressure and my middle finger, and nothing gets fixed?? Since complaining last night, my internet connection is off completely, and nobody bothers to assist me. I have phoned, then sent email telling them I am cancelling my contract with immediate effect. Can you IMAGINE, they refuse to cancell my contract because the email I sent is from a new email address, and not from the email address I used before 2 years back. *** actually?? Should I go back to my ex employer and ask them if I could quickly cancell my Afrihost account from their email?? ARE YOU SERIOUS?? How rediculously STUPID to you get?