XM free line for a year- scam

Signed up for XM with 4 lines in November and the store employees here in MI promised me that I qualify for the free line for a year because I haven't had service with XM in over a year. But they could not add the promotion. They said, just call, they will add it for. I should have known. Several chats and calls later I get people telling me I do not qualify because I had service in the past with XM, even though I disconnected that service over a year ago. So what is it then XM, are we lying to make up sales and then making customers go crazy trying to figure out what is what.