Can't purchase anything here and I unlocked my CC.
Still can't do it,tried different browser,clearing cookies and the cache and still nothing. Strangely,I was able to purchase Shadowgate this morning with much hassle and yes,I'm within my credit limit.
Any ideas?

Do the name on the CC match with what you enter? :) What error do you get?

That the bank didn't authorise the transaction.
But I managed to buy Shadowgate earlier and I'm within the credit limit.

I have gotten the same error last night. I was attempting to purchase Cossacks and it told me the same thing, the bank wouldn't authorize the transaction. I just tried again and it worked. I haven't tried to buy anything else since though...
How many times have you attempted this?

A lot.