Disgusting service at Webafrica and Vumatel !!!!!!!

I am extremely disappointed with the service from my wifi provider Web africa and Vumatel . The customer support which is Wattsapp robot **** and is unhelpful and unresponsive, and the billing was inaccurate and confusing and as a result they have now disconnected my line twice in a 2 month period due to miscomunnication on THEIR end not MINE !!!!!! .... How is it possible for a service provider not to have a billing department that you can call and find out what is going on ????? and due to them suspending my line and yet I paid it I am unable to even try to communicate with them via Wattsapp !!! so what now I am sitting with NO WIFOI and I am unable to WORK !!!!!!!!!! this is digusting !! my debot date has always been on the 1st of every month and yet they have tried to debit a double amount on the 14th of April 2023 ... I was told with the reconnection of my line last month that my premium would now ne R449 going forward and no longer the R699 that I have been paying for over a year but yet the have been trying to debit an amout of R729 x2 ***????????? even if i want to cancel i cant get ahold of them on wattsapp or any other way so you tell me ??? I need a cancellation letter from them in order to go to AFrhost but once again I cant get hold of them !!!!!!! ... I sick and tired someone please HELP Me as I cannot even work from home with no wifi connection !!!!!!!!