Someone help me! 😧😧😧😧😨😨😨😨😨

Hey guys so i joined planet fitness id say 2 months ago, i got a black card membership and i have been going and all that. But lately people have been telling me I shouldn’t have had signed a contract w them bc of how after or whenever you decide to cancel (you can cancel anytime you want) well they told me after the cancellation they still keep charging you fees and all that, they’ve been telling me that was a huge mistake!! And the other day they charged me a 39.00 dollar fee and i didnt know why and i didnt have money on my card so they charged me 34.00 for not having like another fee. You guys im barely starting in all this banking, cards and all that stuff and im really worried i need answers, i dont know if i should go cancel bc i really get work done there, but also later on i dont want to be worrying about fees!! Guys lmk if any of you guys been thru anything similar and what yalls did, or anything you guys suggest me to do or idk help me guys. 😓