What issue are you having buying traffic?
They may be backlogged. I received this email last week:
Dear Customers,
Traffic Holder upgraded its Customer Service system.
If you've sent us any support request, including premium account
requests and didn't got any answer, please repeat your request.
We've lost about 50 tickets in our database for the last few days.
Please submit your support requests from your account
or use e-mail for support requests:
[email protected]
Thank you for your understanding,
Traffic Holder Media
http://www.trafficholder.com