I had 2 email addresses each associated with a separate apple ID, i deleted one and i am trying to have both email associated with one account but i keep getting “ This email address is not available. Choose a different address”.

There have been posts by people who have contacted Apple Support and they were told that if you delete an ID associated with an email address, you can never reuse the email address for an Apple ID.  I have also seen posts that stated Apple told them there was a 30 day waiting period before the address could be used again.You will need to get another e-mail address to use as your Apple ID or you can try waiting 30 days to see if that works.