Also we have the Gmail Technical support for guiding and instructing the user to get out of the issue and the get them to use the service hassle free which they deserve as they are the ones for whom the Gmail is what they at the moment.
Lastly, once the above is tried and still the user faces issue then they can contact the Gmail phone number which is a toll free number where the user can call the technical team or the experts free of cost and get the solution till it is sorted and if not then they will get a callback from the team as mentioned.
https://www.linkedin.com/company/gmail-customer-service-phone-number