Caution - Tablet falls with every touch of the holder

We bought this holder for a disabled friend as a gift. Here is the holder, in which the tablet is placed only with very small plastic knobs loosely on the gooseneck. Thus, the tablet every touch falls down in (almost). It's really a pity that is not here mentioned in the description of it. On the contrary, there is claimed that you could rotate the part 360 degrees. It only works (as a result) when the plastic knobs all just show up - and just only partly because the plastic knobs are very small and the tablet thus completely loose on the gooseneck located. I'm almost hurt to watch as someone touches the tablet, if you know how it loose there hangs, and then watch as the tablet then flies down.
For this, the tablet is but too expensive to constantly fall down. Our friend and we are really disappointed. We send it back and make us to look for another solution.