Impersonation of mother by brother for Online Rummy gaming

Many questions. Please help - this may be a common scene across India now Impersonation was done in my11circle online gaming in the years 2022-25 before gaming act was brought. The Money I gave to my mother for investment was misused by brother for Rummy gaming by impersonation and he claims it was With consent of mother. Cybercrime unit refused to take action as they claimed it was internal family matters, local police also refused FIR though I pleaded for help as money being extorted by brother. PCR case filed, magistrate ordered FIR only on diluted charges 351(2), 352, case converted to CC and now being handled by PP, but relevant bns sections not applied. 1. Please advise what relevant sections apply and 2. what documentation or evidence can be provided apart from tax returns of mother and bank details, 3. mobile SIM, bank in question controlled by brother, what sections apply. 4. What safeguards I should take as my identity document also with him, no impersonation yet in my name, but I fear he might do (we hear cases of fake loans / loan guarantee taken with just PAN aadhaar), 5. what more sections can I invoke. Mother 75 years and I'll health and does not want her health affected in pursuing a legal case - very few evidences (only bank statement) . Brother now falsely blaming me for his Rummy addiction, threatens counter case of harassment and abetment to suicide - his lawyer says there is no intention to cheat or mens rea, accused brother not returning any money but instead wants paternal and maternal assets divided to further cause agony to family. Can share case number and details upon direct number if needed. Thanks for help