BT nailed it. Without being a threat (real threat, not just a nuisance) to herself or others, the police cannot institute a mental hygiene arrest and have her committed for 24 hours for psychiatric observation.

After two times of annoying 911 and the police about her personal problems at being ignored by the pizza parlor, maybe a day or two in the polky will make her realize they are not there to deal with her little problems. When she goes to court, the judge can insist she receive counseling as a condition of parole.