My company gave me a cheque for my full and final payment. When I went to the bank, they said the account had funds but was frozen, so the money couldn’t be released. Can I file a case under Section 138 against them?

You cannot file a case under Section 138 of the Negotiable Instruments Act as this applies to dishonored checks issued for payment of a debt. Since the bank states the account has funds but is frozen, it’s not a case of insufficient funds, but a separate issue that needs to be addressed.