I know you have already tried e-mailing support. The reason I linked that post was the specific information in there regarding the subject line.
In your e-mails, id you use the specific subject line content/format mentioned in the link I provided? Per that post, if you use those subjects they will at least avoid falling into a spam bucket and have a better chance of being seen. If you use any other subject line, your e-mail might well get ignored.