My website is not redirecting correctly

My domain with Homestead is www.keithstrailers.com.

It has been pointing/redirecting to www.keithstrailersales.com (Which is hosted by WIX) for the last 5 years. 3 days ago it suddenly stopped. I you go to www.keithstrailers.com it says:
"This site can’t be reached

www.keithstrailers.com’s server IP address could not be found."

I need assistance in resolving this ASAP, as this has affected our email hosted with google G suite.