If you cannot log in to your Gmail account or experience issues while using the Web mail platform, get help by visiting the Gmail Help Center or posting a new thread in the Gmail Help Forum. Alternatively, phone and email support is available to corporate users with a paid Google Apps for Work subscription.
Free Gmail Account
As a free user, Gmail does not allow you to contact its customer service department by phone. Getting support for Gmail requires you to either search the service's knowledge base or get help from other Gmail users by posting in the service's official help forum.
Search the Knowledge Base
Visit the Gmail Help website, enter keywords related to your issue in the search field and press Enter. Select the topic that most closely matches your issue from the search suggestions or from the topics listed on the next page and follow the steps listed in the article.
Post a Question on the Forum
Get help from other Gmail users by visiting the Google Help Forum and clicking the New Question button. Give a thorough description of the issue you are experiencing and wait for Gmail users to reply to your thread.
Google Apps for Work Customers
If you or your company is currently an active Google Apps for Work customer, you can receive support for all Gmail-related issues either by dialing the 1-877-355-5787 toll-free number or by clicking the Support icon in your Google Apps for Work admin console.