Online Froude/ Cheating on facebook scam

Hello, I am a social media manager and run business to advertise some company's product on my page, for that i manage many facebook page, to expand my business i decide to own some page from other facebook User, so i put advertise for buying a facebook page. After some day a guy contacted me on facebook to sell here facebook page to me, we deal and he give me their bank detail to neft and mobile number, i Transfered money on their bank account by NEFT then after the guy give me Admin access to facebook page but as soon it receive money He remove me from facebook and take all facebook access from me and also took my money, now he stopped to replying me. So i try to contact on mobile number but it is switch of from last two days, and i think their facebook account also fake. I have only their correct bank detail in which account i transfer money, and i think rest all detail he provide me was fake. Then after i researched about this guys and i found it is group of 2-3 boys who run this kind of scam, They offer people to to sell facebook page and ask [deleted] Rs and as soon people transfer money they stop replying and not provide page. So tell me where can i file complaint against this guys and what is procedure. i have only evidence is bank detail and chat communication which happens over facebook. I am from gujarat looking forward to help and guidence Ganapat chudasama