hair transplant repair

[Murphys_Law]

I like to consider all possibilities on everything, including the worst ones. So if I had a hair transplant and say something came out wrong like

1) grafts didn't grow
2) shock loss
3) bumpiness where the grafts where placed
4) larger than normal scar

Would I be able to have it repaired? Could I look normal, even if still balding, but normal ?

It is hard to know what doctor to go to and who to trust. Even the best doctor in the world could have had a late night out or something and what if I was the patient the next day. What if, what if.

I have a bit of bad luck so this is all concerning since this involves surgery, so that is why I ask about hair transplant repair even before booking a surgery date with a doctor.

thanks.