Naturalization Decision email/Letter not received

I have submitted my naturalization application on 23rd Jan 2022 ( Biometric on 25th Jan 2022). Last week, i have received an email from council that they have received my Certificate of naturalisation and invited to book for a ceremony.

When I contacted council for ceremony, I do have to provide decision letter from Home office. But i haven't received letter/email from home office.
Does any one come across this situation. How do i contact home office on this matter?

Approval eMails are now sent on Mondays. Hopefully, you will get yours soon.