What should I do if my brothers and sisters help me?

Call the police, provide the invoice, and the bar code on the outer box is the same as that on your mobile phone. If you enter *#06# on your mobile phone and there is no bar code, the number that comes out is the same as the bar code on the outer packaging box, which is enough to prove that the mobile phone is yours. The public security organ will confiscate it from him and return it to you according to the regulations.