Call center agents information - Not consistent

I called Planet Fitness on 01/10/2020 to cancel my contract as i was only on a month to month basis. the lady who helped me said that my contract was successfully cancelled immediately and that i will not be debited by Planet Fitness again. i confirmed this with the consultant multiple times and each time she confirmed that i don't owe planet fitness anything and the last debit order that was taken 25/09/2020 was the last debit order that planet fitness will take and no further debits will be taken,. on 25/10/2020 another debit order went off. when i called planet fitness the agent told me that i was still liable for that debit order and that my contact was only cancelled effective 01/11/2020 therefor they still had to deduct the October premium? this is not what was confirmed ( multiple times) by the first call centre agent and if i knew that then i would've made use of the 1 month of membership i had left but that was not what i was told and now i paid for a month i never used. i emailed Planet fitness and i get confirmation that a query was logged and an agent will call me back , but a few hours later i get an email to say my query was closed?? this is not acceptable !! your agents are all giving me different information. who am i supposed to believe!!??