Legal analysis: If a small loan company illegally harasses a customer and has a serious impact on the life of the harassed person, the party concerned can call the police.

Legal basis: Article 42 of the "Public Security Administration Punishment Law of the People's Republic of China" Whoever commits any of the following acts shall be detained for not more than five days or fined not more than 500 yuan; if the circumstances are more serious, , shall be detained for not less than five days but not more than ten days, and may also be fined not more than five hundred yuan:

(1) Writing threatening letters or threatening the personal safety of others by other means;

(2) Publicly insulting others or fabricating facts to slander others;

(3) Fabricating facts to frame others in an attempt to subject others to criminal prosecution or public security management penalties;

( 4) Threaten, insult, beat or retaliate against witnesses and their close relatives;

(5) Send obscene, insulting, intimidating or other messages multiple times to interfere with the normal life of others;

(6) Peeping, photographing, eavesdropping, or disseminating other people's privacy.