Terrible service, incorrect charges just being deducted off my account!!!!!!!!!!!!!!

Still no reply or contact from Vodacom. My 5th query is still unresolved, been 9 days. I am being overcharged again with R757.12 for the recurring data that should have been taken off my account last month, They didn't take it off with the other so charging me again. Been over charged for 2 months for data that I have no ordered for an error they have admitted to but it is not resolved. Who do I escalate this to or report it too. Over charged last month with R1600 and this month R1500 when my bill should be less than 700. Reference numbers *** and ***