ICICI Bank — Ipo mandate amount blocked from ICICI Bank but not released yet

I have applied for VIBHOR STEEL TUBES LIMITED ipo and given upi mandate through icici bank. As per the ipo dead lines if the shares are not allocated the money should be released on 19th of February in my case the shares were not allocated, and same time money was not released by icici bank. They kept blocking the money after 19th also.
And on 19th i have called the bank customer care and i have asked them why the money was released as per sebi rules. The customer care executive informed me it will be released on next day. But the money was not released on next day also. Again i have called and customer care executive was not at all aware of the meaning of the ipo and she has tried to transfer the call to some unrelated department and another executive picked up the call and informed me the money will credited on next day.