My cheque was deposited but bounced, and it’s been over three months. Can I file a legal case or re-submit the same cheque? I’m not sure how to proceed.

You can file a legal case under Section 138 of the Negotiable Instruments Act against the drawer of the cheque. You cannot re-submit the same cheque as it has already been presented and bounced. You should consult a lawyer to understand your legal options and proceed accordingly.