Incorrectly debited and cannot get through for refund! Every Month! Same story!

I cannot for the life of me understand this! almost every month I get billed more than R250 over what my contract is, then I have the most tedious task of actually trying to get through to them to give me a refund, of which I don't get, I get told that they will add it to my next invoice! ******* man! Now this month again, and again, I cannot get through to anyone on any number that is posted on the internet! the numbers that they do give you push you around in circles, and you receive sms after sms after sms to use self help service ! GET REAL MAN! WHO IS GOING TO REFUND ME MY MONEY!????? this is a telecommunications company that cannot even communicate a decent workable contactable working number where someone actually answers the phone and sorts out an issue without going around in circles for HOURS! I am beyond frustrated! ENOUGH man!

I want someone to contact me and have this sorted today! I am tired of being inconvenienced every single month!