Continue to send support tickets and try to contact them through their official thread[1] or their twitter[2], always post the ticket number so they could check it for you fast but honestly, all bitcoin services start with an awesome support, as soon as they start making money and get more users, they put less effort and resources in support.
[1]
https://bitcointalk.org/index.php?topic=229438.6340[2]
https://twitter.com/bitfinex