Shocking service

I requested a down grade on my land line to a cheaper service on the 20.6.24 - I receive an email confirm the down grade . However since then, the message i get is - MOBILE NETWORK NOT AVAILABLE - I been calling since Friday the 21st, just refered form number to number, with no Joy at all - an entire week I ma being charged for a service and forced to use my mobile phone incurring cost while paying Telkom - over the years I have never had a pleasant experience with telkom - How are we supposed to run a business? Unbelievable