Release Easement letter

I am building a Pool and deck structure that will encroach into a utility easement and Miami-Dade zoning is requiring a release letter from the utility companies.  I've obtained them from all the utility companies except for AT&T.  The contacts they provided me all have non-working numbers.  Apparently, I need to contact the construction and engineering department for the Southeast.  How can I get this release letter (letter of no objection) or what phone or email can I contact to request this?

My name is Rodolfo (Edited per community guidelines) Hernandez my phone number is 305-303-9233

my email is (Edited per community guidelines)[email scrubbed]