Poor service

I opened a 2nd contract at acc at Jabulani mall for a laptop and router i made it clear that it should be a top up to my surprise the bill comes with an amount that is higher than what is on the agreement when i consulted on the 10/01/2020 ***A i was informed i took an open plan of which i didn’t then i informed the call center to close all the channels of topping up they didn’t tell me the same channel is available on self-service, what happed to client 1st and going the extra mile ?? where am I suppose to get money I didn't budget for every month what is Telkom going to do about the 2 consultants who didn’t do their job as well what guarantee do they give me that it will never happen again??