Terrible Billing Service

I downgraded my package from the R479 one to the R250 one because of no connectivity. I even received confirmation from Rain that i will now pay R250 but to my utter surprise, they want R507 from me this month...Like for what?? What exactly am i paying for. Why would i pay more for something that hardly works.

Please Rain sort this out otherwise i am cancelling for good.

Please sort