Not sure if it is an arnaque ( a con)? This site may help

[anotherbanana]

This picks up false invoices, letters from fake recovery firms and the like plus loads of other stuff. Might be useful:

https://www.signal-arnaques.com/

[Le martin-pêcheur]

Another site which gives you ratings for websites, some of which could be trying to scam you  https://www.scamadviser.com/ 

Useful in this modern world of cyber crime...................😣

[Lehaut]

I liked the young persons reply when asked if he knew he was receiving a spam call.  His reply, when the telephone rings!

[Judith]

If the number is not in my phone, it's most probably a spam.  Don't answer numbers not in my contacts list.  If it's important enough, they'll find another way I say!  Emails - likewise.   If I don't know the name, it gets deleted.  Yes, I use the usual, check where it came from too.  If I didn't buy anything from them likewise.  Spam web site, only go via links I already have .. doing my best  you see.