Steam Store not working??

Dec 30th I tried to buy some games in the Steam store and got an error message stating the was a problem with the purchase contact Steam Support. I have tried it through the client, Firefox, and Internet Explorer. I have done it with Paypal, Visa, and Discover and same problem.

I submitted a ticket with them but it has been 24 hours with no response. How long do they normally take to get back with you? Anyone else experiencing this issue?. I would think that someone wanting to spend money on their site would get a decent priority.

 
Well I am still having issues and no response from Steam. I finally hit on the idea of gifting the games I wanted from my son's account (who lives with me). That worked for me. I will update with the response time of Steam and what the final cause was for other's information.