Having read this again carefully, I think you make 2 very important points 1) Your friend was actually indicating right to change lanes, and continued the signal to indicate the right turn. 2) the manouevre into the rh lane was (virtually) completed and you were already turning right into the side road when the collision happened.
This suggests to me that the other driver was at fault, and it is certainly not just down to your friend. The lane change looks like it may be a complete red herring. She was correct to firstly position herself in the left lane when she turned left, and then change lanes before turning right. The sticky point is whether she turned right from the left lane, which sounds possible, but that may not be obvious from the insurance claim form (if you know what I mean!). The insurance companies will probably settle "knock for knock" but I blame the other driver who it seems ignored your friend's right indicator signal. Think about this - if your friend had just been changing lanes, and not turning right, is it possible that the other driver would still have run into her? That may throw a very different complexion on things.
The location of the damage is not a factor because if she had turned right from the lh lane the damage would be the same.
Report the calls to the police again, and keep reporting them until something happens. This is unacceptable behaviour and should be dealt with. If I remember rightly, the insurance claim form may ask for details of any communication with the other driver. If so, then mention the phone calls on here as well. This will do no harm to your friend's case.