I haven't done business with the mentioned store (Tri County Racing) but I just visited the site. Tri County Racing really isn't doing *Due diligence* when these issues are arising. On their website they must:
1) say to add @tricountyracetrack.com to the whitelists so when they send e-mails they are read.
2) call back their customers and NOT just e-mail them, especially when it's (SMTP) known to NOT be a reliable source
check the following page
http://www.tricountyracetrack.com/contact.php