Cancel or change Pro
Pro is billed by Apple. On your iPhone, open Settings → your name → Subscriptions → RepCup. Cancelling stops the next renewal; Pro lasts until the end of the period you paid for. Refunds are handled by Apple at reportaproblem.apple.com.
Pro on a new iPhone
Sign in with the same Apple ID, open RepCup and tap Me → Settings → Restore purchases.
An invite link doesn't open RepCup
Install RepCup from the App Store, then open the link again. Or copy the link and paste it in the app: Leagues → Join with a link.
Report or block someone
Open the league table, tap the person's row and choose Report or Block. Blocked people disappear from your tables.
Delete your data
In the app, tap Me → Settings → Delete my data. It removes your account and everything stored with it. Deleting doesn't cancel Pro: cancel that with Apple as above.
More
How we handle your data: the privacy policy. The rules of the app: the terms of use.