Q: How I do I stop everything on my phone going to my iPod messages phone calls

Delete the email account from the Mac Mail app (Maile>Preferences>Accounts)

In Messages>Preferences>Account information either uncheck enable the account or delete the account via the minus sign on lower left. Under Setting you many also what to unckeck the phone number.

In FaceTime>Preferences>Settings uncheck iPhone Cellular calls. If you do not want FT calls then also uncheck your phone number