There are other ways to contact UKVI if you’re outside the UK.
If you’re inside the UK, who you need to contact depends on what your enquiry is about.
Only someone you’ve given permission to can contact UKVI on your behalf, eg a legal representative.
Change of address or legal representative
Tell UKVI if you change your UK address or legal representative.
Biometric residence permits (BRP)
You can also report an immigration crime.