Worst service ever...

Today, just after 8 my fibre line was cut. I have had fibre with them for the past 3 months and keep having to call in order to request a invoice to pay them. Last call was the 9th of July asking for an invoice. To which they sent me an invoice showing we owe nothing. My wife called thereafter to find out why as our installment is just over R900. We heard nothing back after it was "escalated". Now, In the middle of the weekend on the 10th. Our fibre is cut.... What kind of client service are we receiving here? Where we beg them for invoices to pay them and they cut our fibre half way through a weekend?