Poor very poor unsatisfied service

Their services is very very extremely bad. Since November 2019 we are unable to make or receive calls. Telkom has send us a bill of R5000. How do they expect we must pay for services that we can't make use of. Various emails and correspondence have been made. Still no satisfaction from their side. We are a business and we are busy losing clientel because of Telkoms poor service. A technician was on side. Still no satisfaction.