No LTE-A service since 23 April 2019, zero assistance yet i just recieved a statement for full payment

Have not had connection since 23 April 2019. Sent from pillar to post with endless promises of call backs. It is now the 6th of May 2019. Still no one wants to assist. Cell c not even attempting to fix anything by migrating my contract or anything. Instead i just recieved a statement for April which is full payment for a service they provided for 3 weeks. Why am i paying the full amount when Cell C has dishonoured the agreement. They are to provide a service from the first of the month to the last day of the month. They did not but i am to pay in full. I still had 8gigs of data i couldnt use. This is ****************. They many other posts that are complaing about the same thing, LTE-A 24 month contracts with service that was cut on the 23rd/24th of April. Cell C is recovering the monthly contracted fee from everyone yet did not provide the service. Surely this is against the law. Charging us for a service not provide. Some one please assist. Action needs to be taken against Cell C making thousands if not hundreds of thousands of rands from us and not even accounting for it. Not looking to make it right.