Can not update (tried 2 GPS)

We bought me and my father the same GPS there is less than a week. On both, nothing comes to update. So when we read on the box "Free Upgrade for life", we wonder if this is not a joke, since we already happens not to make one. Tried from a Mac and a PC: Same result with multiple attempts on 2 GPS.
The same problem had already arisen with XXL Live model there 2 years the system had blocked. After 1 hour of service spent on the phone, the update could never be realized. Result: 40 euros spent in an update that has never been done. This looks like the big foutage of mouth.
So direct return to the seller with a refund request. As for me, Tom Tom, you're done! I'll see competition.