Unfair bill rising for no reason given

TELKOM BAD BAD BAD with my bill being R250 suddenly rising up to R483 and then R512.33 heaven knows why really then you get their customer service RIDICULOUS i waited 2 days for them to contact me then your get their one agent Tabiso not sure if its his real name coz he took too long to tell me his name BUT RUDE i had to battle with him to get in a say he was talking over me i had to ask him to not speak in such a rude manner to me but he just went on so i asked if i could then change from debit to eft then so he was like no but if you do do that you will have to pay ten days in advanced October month they didn't deduct so i eft in the morning but i must now pay a charge of R54 wich i feel is so unfair the first time i had to pay their charge of R200 they bad