Being charged double

Hi, I was on "5 Gb anytime + 15 Gb nitetime" 12 months data contract with Cell C for R99. The contract expired in May. And starting June I'm being charged double (R199) and getting half of the amount of data (5Gb anytime + 5Gb night). I logged a query for this with Cell C on 12 Sept and was promised that I will be refunded R400 on 15 Sept. Since I didn't get refunded and no one contacted me on the 15th, I started to call the Customer Service the following week (called 3 times). Eventually on 21st Sept, I was promised that I will get my money on 22nd. But instead of the money I received a phone call from a rude Cell C agent, who said that I will not be refunded because I was on a promotional 12 months contract and since it expired I was moved BACK to my PREVIOUS contract!? When I said that I never had a data contract with Cell C before, she just started to shout at me that my promotional contract expired and that's why I'm being charged double and receiving only half of the data. She shouted that non-stop 20 times, not letting me say a word. I asked her manager to call me but of course no one called me back.

Just to let you know that I have the contract and it clearly states this: " 4. What is the duration of this agreement? 4.1. If this Agreement is not cancelled during the Contract Period or on expiry of the Contract Period and is not renewed, then this Agreement will run for the Contract Period and after that IT WILL CONTINUE ON A MONTH-TO-MONTH BASIS UNTIL THE AGREEMENT IS CANCELLED." So basically, Cell C is not sticking to it's own Agreement and at the moment ********ly deducting extra money from my account.

I really hope that a reasonable and sane representative of the company will read this and will refund the extra money that they've been deducting from my account and add the data that they've been *****ing from me in the last 4 months.