It is a scam which I had thought had been well publicised but obviously I am wrong on the well publicised bit.
Did you give them any access to your system? To be safe run an anti-virus check and anti-malware. You may well want to change passwords.
iPhone X review
How to find a font: Discover the name of a typeface with these apps
The best iPhone for 2017
Les meilleurs logiciels de montage vidéo gratuits (en 2017)