How to encash 25% deposit made in Banks under PMGKY Scheme, 2016?

Dear Professional Friends, One of my client, disclosed Income Under PMGKY Scheme (IDS scheme) & filed Form-1 accordingly, by paying the taxes @ 49.9% and also deposited 25% of the disclosed income in nationalized bank, now the lock in period of 4 years completed for deposit, how can he encash the amount from the matured deposit?
he has shown "form-1 & deposit receipt" both to the concerned bank officers & jurisdictional assessing officers, but both expressed their inability to guide me.
Professional Experts are requested to guide to encash the deposit.
Thanks in advance.
CA Satish