I have a solution for those who have had this problem. I have researched this for weeks, as I could not get into my trunk. The FOB button didn't do it, the button by the shifter didn't do it, and being a convertible, I couldn't crawl through the back seat.

What I found it, the back seat, on the driver's side, pull the cushion away from the side of the car, about in the middle, and hidden away is a key slot that you use your car key to turn and force the trunk open.