Voelgoed Winkel Verrso Digital Reader

I brought epub books from them, you have to download their app, Verrso Digital Reader, to read the books. I did and it worked for about 3 months and all of a sudden the all my books are gone. I send email to all the people I could get email adresses from, Melissa, Wiehan and bestellings. GEEN TERUGVOER!!