I messed up !!!!!!!

So i purchased a subscription of chess.com and i got a free trial for one week and it starts charging on 7th October. I got an SMS from bank acc of having money deducted on 6th October to apple media services so i immediately canceled the subscription but the money was still deducted. I contacted apple service but they are saying to contact the bank but the bank is also not helping. What should i do????Will i get my money back? Ik this isn’t the right place to post it but three nowhere else that i can!