Your account is deleted right away.
Email support@rollsby.live with the subject "Delete my Rollsby account" and your player tag (shown in Settings, Account, and on the Friends page, like #K3X9P2Q). We'll delete it within 30 days and confirm by email.
Copies in our backups are gone within 14 days. Purchase records are kept without any link to you, for accounting and fraud prevention. Coins and looks you bought can't be restored once the account is deleted, though No Ads can be restored on a new account with Restore Purchases.