CANCELLED PLAN, STILL GETTING BILLED AND PRICE HAS INCREASED

I cancelled my plan in August, went through the confirmation process to make sure it was cancelled, but now I'm being told to pay for September, that my annual plan renews in October and the price has increased. I’ve tried again but it wants me to update my payment details (my card expired at the end of August) and pay for September before I can cancel my plan again????

You guys are really pissing me off, and on top of that, I was charged twice in August from two different bank cards????????????? One of which hasn’t been on a file for months now?????