How to contact Instagram and Facebook using email address / form

I need to contact Instagram and Facebook in relation to my accounts. Is it possible to send them an email using email address or contact form ? Is there something like support email address where I can contact them ?

When your Instagram account has been deactivated or suspended, you can try to appeal account deactivation using these contact forms:

https://help.instagram.com/contact/1652567838289083

https://help.instagram.com/contact/396169787183059