Clients just pay me escorw, they dont realize the whole price on project

The clients with names Drew R. and Aaron S, use my design, they just pay a deposit, after that, they make a hundred changes on the project, and when we are close to finishing the project, they say wait me to check files and I will message you. I have worked on Upwork and Fiverr and when we talk with clients there for 3D modeling, I finish there job and they pay me for that. That client didn't ask me to wait to check files if they will be good for 3d printing as Drew R asked. I don't see here reason to stay, I cant not wait my money just to be in Escrow, I need that money on my account able to transfer to my bank account. Also contact support doesn't take any action against these buyers, I sent them proof screenshot of chat, they say to me if clients want the project will be paid, if not, the project will be left as open. Where is the point than, client Drew R ask me to do 3d model without sketches, and I politely do, at the end I was stupid and manipulated. So a catastrophic experience.