State Bank Of India [SBI] — unauthorized withdrawal of 20000

I santosh prasad holding a/c no - [protected] from subroto park branch, new delhi. On 02 jul at around 1545hr i received a message in my registered mobile no with bank regarding withdrawal of a sum of rs 20000 from icici atm, which was not done by me and i was in possession of sbi card at the time of transaction, immediately same day i reached at my subroto park branch and i registered online complaint to cms (Sbi) after discussion with branch staff. Thereafter i submitted all needful documents which they (Branch) required. Now almost 70 days has been passed but disposal is still awaited from their side. Hence i am feeling very harassed by branch. I visited number of times to the branch (Subroto park) but their response is very negative
Hence, further you are requesed to look into this and kindly help me to avoid my financial hardship.
Thanking you.