Stolen Video Content

Hi,

I have seen that my content which I uploaded to another stock site have been stolen and uploaded here by another person.

I've joined Adobe Stock not long ago and started submitting my content. Because some of my videos got stolen and have been uploaded here by someone else already, I can't submit them. The person have stolen my videos from another stock site and uploaded here and selling my content claiming as his own.

What is the fastest way to remove these contents (approximately 50-60 videos) from that profile? Who can I talk to about this problem?