Hi - we can all slate others work - but im talking with my hat of here - i would seriously ask them to re-scaff, remove all the panels and start again, its not good my friend from photos your showing on here. All they need to do is start over and make it right, the tiles are kicking up too far, it looks like they broke another one and used lead flashing to cover it up, brackets no straight, connecting rail gap too large. You paid your money and you deserve better.
Ive had my problems don't get me wrong, and ive had to taste my own medicine - resurrect scaffold and re-do a job, but i know its right now.