Cannot access admin console google workspace

Hi, my website recently migrated, the hosting company DNS Simple have stated nothing in the DNS changed when updated but the google workspace email is not working since the migration. Gmail is saying I am not the administrator and I have no way of contacting the company who set up the website in 2011 because all information is on the email I cannot access. I urgently need help restoring my email without loosing the information. The website is built via Squarespace but DNS Simple is the hosting company.