Formal Complain against Telkom with their **** service

Good day

I am writing as a customer that is not happy with Telkom at all. i currently have 2 contracts with Telkom one for the phone and one for the modem. the Wifi constantly has issues every time when i decide to switch it on it comes up with an error "you have depleted all your data" mind you i will be switching it on for the first time that month. i have call your agents and complained to them and none of them give me a valid explanation they keep telling me that the modem was on the entire day and that ended up finishing my data. of which i didn't even switch it on. Currently i have no notice that the amount i am paying is no longer the amount we agreed on. my agreement was that i get 15G 5 during the day and 10 later on and now i am currently R560 for same data that i haven't used for a very long time.

I have attached the same statement that i am currently talking about i need answers please urgently

Kind Regards Precious