Inappropriately informed

I don't know what to do I phoned to cancel gym membership they said I must go to gym to cancel but they told me it was a 3 year contract and in order to cancel I must pay 3000 but the guy said it was free trial I went to gym for two weeks but my working hours are hectic do you think it's fair to pay for a service you not using I stopped debit order but they keep changing the date so now my bank account is in a negative there are other expenses more important than paying the gym like rent I'm so annoyed I tried there website but it doesn't show head office details and there are a lot of people complaining on hello Peter