Try to be clear and descriptive when posting your question.

How are you accessing your cpanel, is it by yourdomain-name.ext/cpanel or something else?
If you have an access to your domain control, can you see where it says something like "DNS control" or "NAMESERVER"? If not, where did you purchase your domain (state the company name of a registrar)?

When you activate your hosting account, the hosting configures according to your input field values--this means even if you misspell your domain name (which happens to Trap17 members about 40% of the times) the cPanel will enter as you registered in activation fields.

For example, I can activate new hosting account with Google.com and my cPanel will show as "Domain name: google.com" but that doesn't mean google.com is pointing to my hosting account.

To cover every aspect, if you were under the impression that Trap17 provided your own free domain as well as free web hosting, this isn't entirely true. You must first become a hosting member then use your hosting credits to purchase free domain name.

UPDATE

As suspected, WHOIS record shows no such registered domain name.