HDFC Bank — ipo mandate was not reached in demat account but bank has hold my money

I applied for sbi card ipo dated 2nd march 2020. I gave the mandate through hdfc bank upi on google pay app. My money got blocked in the bank but the mandate acceptance confirmation didn't reach dmat account. Hdfc bank support is not very helpful. I contacted google pay but they are not able to resolve my issue. I might lose a great opportunity of a lifetime to buy stock through ipo. Tell hdfc bank to put my money into savings account from hold