Cannot reactivate theme

I went to update my theme and then everything went blank and I lost access to my wordpress dashboard and website. I contacted bluehost and they said the problem was the Highend theme and they needed to uninstall it to give me access again. I tried to reinstall it and the same thing happened. I cannot reinstall this theme and my mojo marketplace will not allow me to activate it either. It says “You need to authorize this site in order to get upgrades or support for this plugin. Purchase a license or enter an existing purchase code.”

I don’t understand why all of this is randomly happening?