I registered a domain using X10hosting about 30 minutes ago and I paid using Paypal and the payment was received. But its still pending in the client panel and I cant change it to the primary domain. :s
To be quite honest with you I'm not sure what the precedure is for this. If there's still no change within a good time limit (24 hours) then your best bet is to open a support ticket - http://support.x10hosting.com/.