Btw, at the bottom of the site is their email for support>
support@ahashpool.commaybe try to ask there
Announcement: (2017-12-20 16:00 UTC) Bitcoin network is very very congested, we are aware of the recently payouts being still unconfirmed. This has happened many many times before, and it will get confirmed eventually. Please kindly be patient. Thanks. That's funny how I missed their email there.