maybe someone could help me

[ElPrado]

Make sure the promo is in effect for Thorograph first. It may not be started yet. Waiting a week or so won't cost anything if it does what you need. That way you can sign up for the free promo and you know if you like it rather than get jammed into something. I've used Thorograph. It worked for me. Some people are looking for something else.
I'm not saying it hasn't started yet.... no clue, just make sure it has. The dates will be posted somewhere on the ad that the promo is on. You can take it from there.