Bank Of Baroda — bank refused to credit the interest portion of the fdr given for locker to my sb

Address: Bangalore, Karnataka, 560068

I am mrs kiran k, an a/c holder of bank of baroda btm branch. I also have a locker there for which a deposit of ₹10000/- was taken as a security. At the time of making the fdr i was asked whether the interest to be taken at the time of maturity or on a quarterly basis. I had told them that i shall take it on maturity so that i will get a compound interest.
The deposit matured on 09.09.2018 and i requested the official concerned to credit the interest portion to my sb and renew only the principle amount. But to my shock i was told once it is linked to the locker no amount can be released. Release can only take place at the time of surrender of the locker. I was also told that the system does not allow it to be touched at all!!!
Suppose i keep the locker till my death that means i am not able to enjoy the interest portion during my life time... What rule is this... I request you to kindly clarify me on this part and suitably advice the department official as i would like to withdraw the interest portion for meeting my necessities in life as i am a retired senior citizen.
I hope to receive your reply at the earliest.