Changed domain, alias won’t setup

Changed domain, alias won’t setup

Hello, 

I changed my domain from techgarage(dot) gq to techgaragenc(dot) com, and so I deleted the dot gq domain, and added the dot com domain. I got it verified, and got to the add a alias step, I typed in admin@techgaragenc.com, and it said unable to alias address. What should I do? Please respond ASAP, as we are a busy company!