Warrentee

i bought a Apple IPAD in the shop, they told me to register it for extended warrantee and that i will receive a certificate for it. So i did. but according to the system they would have mailed me the certificate. nothing received i mailed the customer services couple of times without any response what so ever. NOW the question is do i have extended warrantee or will i only find out when ever i have problem that i don't have any warrantee. They might as well delete their customer services email box