My wife is a Serbian national, with a permanent residence in the UK (I am British). She was recently sent to Belgium by her company for some training. She got a Schengen visa type C, for a maximum stay of 30 days.
The training course has now been extended for another week, which would mean that she would have to be in Belgium for 36 days.
Do you know:
1) If she can extend her visa for the required time while she is in Belgium,
2) If she can, where she needs to go to do this.