Cell C *********** staff

I've been a loyal customer for 2 years, so now my contract came to an end on April. I took initiative and asked cell c for information on what the way forward is since my contract is coming to an end, the response I got was that nothing will change apart from the fact that I'll now be on a month to month basis subscription. Honestly, when the person said "nothing will change" one would think that it meant that my monthly payment and monthly data will remain the same but oh no, they have changed my subscription to a much higher rate with the same damn Gigs per month. I called their cancelation department and found out that I'll only be released from the contract month end of June, but how cause a 30 days notice means that since I requested the cancelation today on the 7th of May then it means that, the cancelation will come into effect on the 7th of June. I'm utterly disappointed and disgusted by how they are refusing to take accountability of their actions. I refuse to pay for something that was not communicated to me, I will carry on paying the amount that I have been paying for the past two years.