I have had PLENTY of experience dealing with City Council (unfortunately) and since a church is a "part of the community" they tend to give a lot of lee-way to them.
What I suggest, first try to speak to the Pastor, regarding this matter. Document every interaction and every time you are disturbed. If they do not cease the disturbances. Get a neighborhood Petition going. Present it to the Council at a public forum or citizen's forum, where you may address the council. Make it a public record!
Still, if nothing is done to correct this problem.. then call the media. Channel 9, here in Charlotte, have a whistle blowers line. They do community action stories. See if your local media has this available.
After all how Christian is it, to rob your neighbors of peace? Good luck!