VODACOM CAN NOT BE TRUSTED

I received a quotation on 11 September 2018 for an up grade on an excising line to a 20GB data package for the total monthly amount of R223-51. In my conversation with the consultant we agreed on this amount and the router was delivered to me. When I received the first invoice dated 03 October 2018 the monthly amount was increased to R280.96 without my consent. I reported this discrepancy and was referred from the one department to the other. I have spent hours on the phone to achieve absolutely nothing. Every department escalated the complaint to a "solutions expert" and I received various reference numbers for the same problem from each department. It is now almost 2 weeks and I have not received any feedback from VODACOM.