cant deliver service still wants payment

so the 18th of april you lost fixed lte connectivity in welkom. aftwr numerous calls i was told it was YOUR fault their is nothing you can do to fixed this and i shoud cancel this it wil cost me NOTHING because it was YOUR ERROR.then you send me a statememt for the FULL APRIL AND MAY FOR SOMETHING I CANT USE BECAUSE OF SOMETHING ON YOUR SIDE. i emailed them i want a new invoice for the days your network did work but now i got a threating email that you are going to hand me over? you want me to pay for something i cant even use because your network suck and i had to go over to a new network? AND ALSO ARE YOU GOING TO GIVE ME THE 30G I LOST BACK??? YOU ARE QUICKLY ABLE TO PHONE FOR MONEY BUT CANT SORT OUT YOUR NETWORK. DID YOU EXPECT YOUR CUSTOMERS TO STILL PAY FOR DATA THAT CANT BE USED OR TO STAY WITHOUT DATA UNTILL U GET YOUR ACT TOGETHER?? if i get handed over because YOU CANT GIVE ME A SERVICE BUT EXPECT PAYMENT I WILL TAKE THIS TO THE OMBUDSMAN... dont u think you have done enough damage to your clients?? YOU CANT CHARGE FOR SERVICES YOU CANT DELIVER!!!