shower panel

I have a shower panel/tower that has a overhead shower head, a handheld head, 4 sprays, and a tub head/faucet. The overhead shower leaks and I don't believe it is a problem with the head itself because the overhead shower still leaks when the head is taken off. My question is how do you go...

I had a local plumber that was highly reviewed on Home advisor come out yesterday to install my new shower panel. His plan included cutting out the drywall directly behind the shower to put in a access panel. Unfortunately, the wall behind the shower was at a diagonal angle and he couldn't get...