18 and hopeless

I am 18 years old startup founder from north africa : last year was my final year at high school.I spent most of my time working on my product so I got bad grades and didn't qualify for engineering school.They did put me in design school and now I can't get even a PHD or masters degree.I always wanted to be a computer scientist or at least an engineer : my dream is destroyed now.I can't work without a degree in computer science and can't even a get a visa for Europe or USA.What should I do ?