Youtube video proof of the scam:

https://www.youtube.com/watch?v=jjIZGrmff90

There is also this:
https://www.okchanger.com/exchangers/megachange-is

I see too many reports of scamming there...

Yes, it seems they are scammers (they deleted my support profile also).

Interestingly they are partners with Lavapay: https://www.lavapay.com/en/where-to-spend/index.html

Now I wonder if Lavapay is also a scam sister site, anybody using Lavapay?