Extremely poor customer servcie

I have a Fibre contract with Vodacom for the past 7 years. Every month end they debit my current account with the amount of R543.09. On the 30th November they debited my account with R1 400.00.49. Needless to say I was shocked and immediately lodged a query with them telephonically. I was advised that their service provider Vumatel has placed all their clients on a 50 up and down line from October 2023 and Vodacom did advise their clients via e mail. I did not receive any correspondence from them and they could also not provide me with proof of such correspondence either.I was advised the amount was for October and November , but yet , they alrerady debited me in October with R543.09. I was given a reference number SR*** and was advised the turnaround time was 14 days for a refund to be processed. I started following up on the 18th December via e mail and was advised that it will take another 7 days. Now really now, does it take so long to process a refund. I was also promised phones calls but still waiting for someone to call me. I feel that Vodacom does not care for their clients at all as I have been out of pocket due to their error and not mine, Today is the 27th and yet no response to my last mail correspondence or any refund what so ever. Im now considering cancelling my contract with Vodacom and looking at a service provider who value their clients and that will provide me with the service Im paying for and deserve. No Vodacom , this is now how u treat your loyal clients who religiously pay their commitment every month without fail.