Internet down for 10 days

I am a Telkom customer for well over 20 years, but for the last week my internet has been down from the 10/12 to current which is unacceptable. I have called the Telkom call centre multiple times, have replaced my router with a new router but my connectivity is atrocious. Every couple of minutes I see the message ‘no internet connectivity’. I lost my internet connectivity on Sunday evening 10/12, replaced the router on the 16/12 and if I run a speed test my download speed in some instance is 0.84 Mbps! and this for a contract that has unlimited data and 80Mb (Upload & Download) I keep saying to the call centre please send out a technician. No contact from the Technician and they keep closing the ticket.