TAXX,
Hope you used a web based e-mail address and not a local ip assigned one. you can expect a ton of junk mail from that information that was 'never' received.
The surveys have been a problem child since their introduction, and many have had similar experiences, including myself. They are, unfortunately, a bit of a scam and they will gladly take all of your information and decline payout, knowing that a large %age of users will never follow up. Sometime you get lucky and get through them and actually get credits, but this isn't the norm.
WGT has partnered with them for these surveys, and seems to have washed their hands of it. Too bad, as it would be a nice gesture to us players for them to either address these inconsistencies with the survey companies, or get rid of them if they won't start ponying up for our efforts. To me, it is a black eye for WGT to still be partnering with them while these problems persist.