The problems you are having are all fixable. Care to share?
The problems should all be fixable, however Hansons are reluctant to do so due, according to their MD, to the 'fact' that sectional garages are not leak proof.
Thus far I have had a number of panels replaced due to internal cracks, dishing, corners knocked off and just plain old water soaks through them.
The roof was replaced with a felt lined metal roof, with the felt left complete. This wicks the rainwater from the end where it should drip into the gutter up and into the garage.
The cement fillet has started to leak again. Last time it got to the stage that water was sitting on the surface. I thought that this had been fixed, but it's back again.
At at the point I made the OP, the last I had heard from Hansons indicated that they were not interested in trying to fix the leaks. In fairness, I should say that having pointed out the difference between condensation and rain and passing on the advice from the roofing manufacturer that a 3 inch strip of felt needs to be removed to prevent wicking, especially on shallow pitched roofs, I have received an email today saying that Hansons will call to arrange for this strip to be removed.
(of course they could have done this when they installed the roof. Their guys did say that as the strip had not been removed, that they would be back).
If it continues to leak I think it is time to call it a day and will replace it.