I will be doing! Just finding time! Was just wondering if there was a simple trick that I’d missed!

I have a Jan 2018 Qashqai Tekna 1.6 diesel automatic. After about 6 weeks, the rear passenger door would not open from outside, but would open from inside. Unfortunately, the child lock was then applied (by mistake) and now the door won't open at all ! As the problem occurred before the child-lock w...