The verification is sent by your bank using the contact details they have on file; The Lott can’t resend bank verification messages.
You may need to confirm your phone number is correct with your bank (it could be different to the mobile number associated with The Lott) and whether your banking app has notifications enabled.
If you don’t see a push notification, authentication prompt in your banking app, or other puzzle challenge, you might like to try the verification again, before contacting your bank.