Online will get you.... The online response time is approximately 6 months, as of last week, so good luck with that.
You email the hotel directly @ stregisrome@stregis.com
Asking never hurts, I usually don't ask untill offered and then negotiate. So the typical email would go, Hi... I stayed in your beautiful hotel for this special occasion... we had a bad experience with a disturbance.....
Usually theyll respond offering some type of compensation, and from there negotiate further.