The trunk won't unlock with keyfob or a button inside the car by the light switch. It works fine when I just touch the lock thing outside the car above the plates.
Tried holding the button on the keyfob, double pressing, triple pressing and nothing. Tried holding the button by the light switch and it did not work.

What could be wrong? Have not red the fault codes yet.
Could it be fuse or some more serious issues like a module? What is the most common fault for that type of problem?
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See if there is a setting in the dash menu that opens all of the locks at the same time when you unlock the driver's side. I think there is. My passenger front door doesn't unlock when I touch the handle and I think that's because of a bad sensor in that door. The front door, trunk and all other doors unlock when I touch any door that has a good sensor. Youtube has destructions on how to replace the sensor.

A faulty sensor doesn't explain your issue of not opening with the button on the dash. That button should be hard wired. It could be two problems - a faulty dash switch and a bad sensor but that seems unlikely on such a new car.