What should I do if my proof of residence certificate has an error in my passport number?

Hello,

I recently received my ‘proof of residence’ certificate in the mail from immigration and it was rejected by the authorities as my passport number had an extra digit on the certificate letter (Chiengwattana immigration error as my application form was correct).

Do I simply take the certificate back to immigration and ask them to amend it or do I need to start the whole application process from the beginning again?

Thanks 🙏