Gmail delivery issues

For the past several days all email destined for gmail (Google email service) have been rejected. Google has been contacted several times through the only support channels available and no response has been forthcoming. Google has no mechanism available for live contact with support personnel and it is unknown when the issue might be resolved. Email destined to all other major ISP's, Yahoo, Hotmail, etc. continues to deliver properly. We continue to prompt Google for some response.