I have also been scammed by this company. I engaged with them last year to create a defi application and paid over $15K USD. I still have not had a working application delivered and all communication from them has stopped.
I created osiztechnolgiesscam.com ( https://osiztechnologiesscam.com/ ) to try and help raise awareness of their activities. If you would like to share your story for inclusion on the website please use the contact details at the bottom of the page.
Osiz Technologies is a Scam.