Kroo
This number is listed by Kroo on its own website (Report a lost or stolen phone if you cannot use the app).
Source: “please telephone us without undue delay on 0800 020 9283” (opens in a new tab). Checked 14 October 2026.
This could still be a scam call
Criminals can make their number look like a genuine one (this is called spoofing). If someone calls from this number and asks for money, bank details, a code or passwords, hang up. Then call Kroo back on the number on the back of your card, or call 159, which connects you to your bank.