Non delivery of WIFI service - Breach of contract

I have renewed my WIFI contract with effect 1 October 2017 from 5 gig to 30 gig. I have done this at the Chatz in Midstream. As soon as the new contract was loaded the existing one was prematurely cancelled / stopped with no reason whatsoever! I have paid for this service up until the end of September by they have stopped it on the 13th of September. I have no WIFi at the moment but I have paid for it. Apart from Vodacom *****ing money from their customers is it also a huge inconvenience for my children that is suppose to do homework and assignments using the WIFI. When I went back to Chatz they told me they cannot do anything and logged a complaint with Vodacom. AND I AM STILL WAITING. In the meantime I have no WIFI AND I HAVE PAID FOR IT!