DStv - Incorrect billing

Been with multichoice for 10 years.This year in May i took a package that was advertised the compact with anytime data of 50GB for R499,i was already on compact so was just adding the internet. From then onwards was being billed R757 and when i queried this in June i never gor feedback, i even logged a complaint on hello peter still nothing from Multichoice, i am very disappointed with the service honestly