I found some of my work on VideoHive by another author but not sure if it's legal (derivative work), copyright infringement or just plain stolen?
Modern web network and internet telecommunication from Oleksiy Mark
Shutterstock: newbielink:https://www.shutterstock.com/image-illustration/modern-web-network-internet-telecommunication-technology-523968604 [nonactive]
MusicoLab at videohive: newbielink:https://videohive.net/item/server-room-network/22586603 [nonactive]
Dude, what are your doubts?
He is a tremendous thief, make a complaint, if the original work in shutterstock is yours.