PAXboy
Thats what you get when flying on a codeshare !
Whose responsible - ticket issuer or the flight operator ?
Vueling and BA are both owned by the same holding company but are quite differing companies legally speaking.
This company almost certainly bought a BA ticket for reward “bribes”.
However that damage looks to have been the actions of the ground handlers, and at one end of that flight an IAG business would not self handle.
Out sourcing at its best the modern way to avoid Responsibility in the supply chain!
With cameras everywhere these days perhaps Madrid or Milan might have footage of the conveyor system that might help.