FED UP OF FIGHTING

I have never recieved such bad services from MTN in my life. I have been a loyal client with the same number for over 16years and this is how i am treated? In June i was contacted for a data package upgraded. was advised that my new amount a month would increase by only R300 or so to my surprise come the end June i paid over R400 then what i was paying previously. To find that there is a "promo fee" which was charged. Bear in mind i was never advised of this fee. i paid the amount and was told that in July my amount would go back to amount advised over the phone. WHICH IT NEVER DID. i questioned this over a month ago and it still not sorted. i refused to pay until the billing was correct. SURPRISE SURPRISE THIS STILL ISNT DONE. When i called in your agents advised that they would escalate this to the correct department which im guessing was not done as i STILL DONT HAVE ANY FEEDBACK. I will be cancelling my account with MTN the moment my contract expires