[Resolved]  SBI — available balance showing zero in sbi o/d a/c even though balance was there on 1st april

Address:

Pune, Pune, Maharashtra, 411027

I am holding SBI Maxgain OD account for home load and I keep some more fund in this account to reduce some interest burdon.
I observed on 1st April my available balance made "0" automatially even though there was some available balance in this account.
Nobody bother to inform me about thins until I noticed myself.
I raised the complaint on customer portal as well as spoke to bank bearer and they said it will be addressed soon as the system is not available for them yet.
It's been more than 24 hours and I dont hear anything yet.

Bank like SBI, it should not happen and I am not able to use my money in my emergency need as maxgain available balance we can use any point of time.
Please suggest what should i do here?