Contacting TT support by email is generally a waste of time. They are right that there is no link between local maps and the satellite reception. However, they did not give you any help on what to do.
If you had no map installed and you booted up your device, it would give you a message the "no maps found". However, it has the Europe map active I believe, so you would not get that message.
To see if you have satellite reception, first tun it on and leave it on for awhile (15-20 minutes), and then you can open up the GPS screen to see if you have reception.
To do that, tap the lower right corner of your screen. It will show a ber on the right side that will have the battery meter at the top, plus satellite bars just below. It should indicate the number of satellites it is receiving. Tap the satellite bars, and it will open up a full GPS status page. If it does not show any satellites when you first open it - leave it on and it will update its status continuously.
Also, if you have not already done so - do a pin reset FIRST.