iTunes Payments

Hi - I’ve had 70 payments of £9.99 taken from my bank account for iTunes - 2 per week (on a sat & again on a Monday).

I have no subscription showing under my Apple ID & I don’t even use iTunes (Spotify user here).

I have absolutely no idea how I go about cancelling this as it doesn’t show in my subscriptions so I’m constantly going round in circles trying to resolve this. Can anyone help please?