Subscription payment

I seem to have a second payment method set up but I can’t see it listed on my account. I had meant to cancel a subscription today for an app I was trying using the free trial but I didn’t cancel it on time- I noticed the payment had failed in my main account anyway due to insufficient funds (money being moved to various pots within my banking app) However I then noticed the payment had been taken from a different account which I didn’t think was linked to my account and I can’t see listed. I’ve requested a refund and have cancelled the trial/subscription. How can I check that I don’t have a second payment set up with this account please? Thank you