Billing continued after i requested a cancellation

I asked for a cancellation last yr

and was offered 2 months free and after tht a 1 final month payment - after which the advisor said my membership would cancel automatically as it was already requested.

I have now been billed and charged 2months after and my account is showing a new roll-over contract has started to last another year.

I would like my contract cancelled, and my account refunded for the months i was wrongfully billed extra

please help

thank you