Unstretchable Dough problem
It stayed like bread crumbs? After you mixed all your ingredients together fully? If you added water, and your product is like bread crumbs (separate small particles that do not stick together), then you did not add enough water. I would not even call it dough until you can clump it together into a cohesive ball of material which you can then roll out, pat out into a flat patty, shape or manipulate in some way.

There may also be other problems with your dough than just not enough water. If you list the actual quantities of the ingredients you used, and say what sort of finished product you are trying for, people will be able to give you more precise advice on this.