I had a call this afternoon from th same phone number. They asked after my credit car number and mentioned a 325 Euros registration fee. They're running a complete call center for this [***]
I admit they can get a bit annoying, but i've been their customer for a few years now (haven't won yet) and they do everything they say they do. They really do hand in your application in your behalf and they help you with it to make sure it's correct. I wouldn't call it a scam. Just a company that's a bit annoying with their calls.