late credit of local cheques amount

Location/place: kandivli east

I deposited 6 cheques in 6 ppf a/c of my family members on 04.07.12 and as per bank rule amount should be credited on 05.07.12
but it was credited on 07.07.12 and as per
ppf interest calculation rules I lost interest of 6 lacs for one month on my family’s ppf a/c so bank sbi midc andheri branch is liable to make the loss of interest amount good for all 6 a/c.no 30851663397,30851662576,30851663035,30851663669,30851663987,32253379762