Cell C Fibre Billing issue and no internet service

The connection was reinstated but it was suspended again from yesterday 16th Nov. The collections team send the invoice for the outstanding arrears, which I don't want to pay fully as there was a period close to 3 to weeks no internet service, but the invoice includes the period where my fibre was suspended. As soon as I received the invoice I have responded to that mail id stating the above concern, but no reply till date. All their mail boxes no one reads and responds, such a pathetic service. I have called the call center yesterday evening and raised the complaint, till now no update. Also I have paid R694 to cover the portion of the outstanding amount, but don't want to settle everything as I was disputing on their billing for the period, where there is no service. The person who suspends the account never looked at any of these, or not even called me to inform it. They always do the suspension over the Friday so that the customer can suffer on the weekend. The invoice states, settle the amount if not the service will disconnected at the end of the month, but they never keep their promise and suspended my account in the middle of the month. Either activate the connection and send me the updated invoice with correct calculation, else please cancel my service, so that I can go to another provider, Cell C is not the only provider in this country.