This is the 7629th most frequent Russian word.
жалобами
"Complaints."
Here, 'жалобами' ('complaints') is in the instrumental case, used to describe what the patient brought to the doctor's attention.
Пациент обратился к врачу с жалобами на головную боль.
The patient consulted the doctor with complaints of a headache.
In this sentence, 'жалобами' ('complaints') refers to grievances expressed by neighbors, emphasizing the subject of noise.
Молодая пара столкнулась с многочисленными жалобами соседей на шум.
The young couple faced numerous complaints from neighbors about noise.
'Жалобами' ('complaints') illustrates the focus of the teacher's activity, referring to grievances submitted.