Debits going through when account had to be settled

My agreement ended in August 2020 and I received an SMS on 20 Aug 2020 stating that if I wanted to unfreeze my membership I should reply with yes. I was shocked when I saw debits taken from my account despite the fact that I never joined again. When phoning today I was told I have to pay for 2 months but my agreement had to be settled in August already. This is terribly customer service from Virgin Active wanting to milk us despite our contracts coming to term.