Hi Ron
I'm sorry to hear that your holiday was spoiled.
I agree with Lassiegirl re posting on the Complaints forum, it's really a generic holiday issue that you seem to have rather than a specific one to Goa.
Obviously you've not given sufficient information for me to comment on what happened but maybe it would depend if the holidaymakers making trouble were with the same holiday company as you.
I've been in a hotel where some people were making excessive noise very late at night and the rep warned them and as they continued to make noise (I think they were throwing sun beds into the pool) he then turfed them out of the hotel to find alternative accommodation at their own expense.
This was a couple of years ago in a small A/I hotel in Mexico, the trouble was caused by young British louts.
Of course, if it was acommodation used by lots of Tour Operators and maybe other nationalities it would be more difficult for your rep to deal with.
Did you personally speak to the manager of the hotel about whatever issue you had or did you just take it up with your rep?
Unlike Meagain, I think part of the role of a holiday rep is to try to ensure his/her clients enjoy their holiday (and to sort out any urgent issues, such as accidents and maybe even arranging urgent flights home).
Good luck