Still not sorted out

I made a complaint last month about my line not being downgraded correctly, after many attempts to do so, instead it was migrated back to Telkom, and I was still being charged by mweb for line rental. This problem was sorted out. But.. as stated in my previous complaint, I wanted to downgrade my line back in OCT 2015, Telkom downgraded my line, but mweb did not. I was asked for proof of an email I sent back in Oct, but my email only goes back 3months, My line has apparently now been downgraded. but upon receiving my invoice, I saw I was still being billed for a 10meg line, even though my line is only 4meg. I do not think it is fair to be paying for a speed I cannot not reach!