Need complete complete guideline against fraud will

Mere father ne kuch agricultural property apne liye rakh li thi after partition. Ab mere mother father ka death Ho chuka h.hum loag 6 bhai 3 behen h. Mere mother father kafi time se partition k badh se chote bhai k sath rehte the. Usne fraud vasiyat bana li h aur property apne bete k naam registered kra reha h. Ish vasiyat me ushi k 2 beto ke naam mera father property likha h. Lekin ish vasiyat me Jo 2 witness h woh khud mera chota bhai aur ek ladke ka sign h Jo other place ka h Jab Mai ush witness se baat liya toh woh bataya Ki mere se sign le liya aise hi smart card purpose se h krke.... Aur woh witness ab mere side h aur mujhe likh k de Diya h paper me sign krk Ki mujhe nai pta tha dhoke se sign le liya h krk Mai ab ush place me 20 years se nai rehta. Ish bhai ne bahut saari property dhire dhire apne naam krwa li h. Vasiyat Jan 2016 ka h. Tehsil office me shikayat kiya kuch Ho nai reha h... BAs baar baar peshi bulta h...tehsildaar ka Ata pta nai h... Aur shayd woh inko paisa khila Diya h. Plz mujhe complete guidance provide Karen jishse mujhe mera haq mil jaaye.