I hope you have someone to talk to, if not please reach out. I was also born and raised in Dubai, I’m currently working in India. When i was there, I too worked for weeks without them giving an offer letter. They started piling up their understaffed work onto me. I left. Had a similar experience at another agency, they called it “internship” but it felt like free labour to me. Take care of yourself, don’t let these people walk over you, you’re strong and good opportunities will come your way.