got similar flight here but from Madrid instead of BCN. I was rerouted day after, so 24 h delay.. On the return back, also 7 hours delay plus 2 bags lost.

You are entitled to compensation anyway, doesn't matter if you applied for a refund. You can do it yourself and save your money, or use any of these complain companies (airhelp, flightright, reclamador...) that will drain around a 30% of your compensation, nearly 60% if you got to court.. I got experience with this, because I travel a lot and happened to me multiple times in the past. Let me know by if you need help

dont let Ita Airways go away with something that belongs to you. It is your right