How long should I wait for an answer from support@grindinggear.com?

Hello, I wrote email to support@grindinggear.com on December 14th from my primary email nail.algadyan@gmail.com, but I am still waiting for a response. Unfortunately, I did not receive even a auto-reply confirming whether my ticket was received. Could you please clarify if I should wait longer and what timeframe I can expect?