yoga go app

downloaded this app this evening via link on Twitter. When looking at it it came to a subscription page with costs. I didn’t press subscribe and decided to just delete the app. This wasn’t possible so got suspicious and read reviews. It’s a scam and you can’t cancel any apple payment as under subscriptions it states £0.00 . After 7 days they take money from your account but can only cancel then when the money is out of your account. Please help Apple as I don’t want to be charged.