Don't use random, invented data. That's wrong. Use the real data of a ceo or other executive from a company that spammed you. Or if you have the time find out who owns the mall and use their information.
I recently did something similar. My daughter's orthodontist practice (it's a large office with multiple locations) from a few years ago sent a spam txt message. I tracked down the owner of the practice and called the office, "I have a new phone number. Please change it on my records."
info@, postmaster@, web@, abuse@, or any other mandated valid email addresses for the service that wants your data.
Any system that includes an SMTP server supporting mail relaying or delivery MUST support the reserved mailbox "postmaster" as a case-insensitive local name.