State Bank Of India [SBI] — ecs deducted twice in a month

Address: 462008

I have taken a car loan from sbi jahangirabad bopal branch and mandate for ecs facility therein.
My first installment as ecs was deducted on5th april of amout 12, 102/-.
Hence my ecs deducts the above said amount 5th of every month.
Likewise it worked well for july as well and on 5th amount was debited from my account.
But suddenly soon after 20 days ie. On 25th july again my fifth installment has been debited of
Rs - 12, 102.

As the frequency of ecs it seems to be a once in a month for my case but still it happened twice without any prior notification ans message.

Really get pissed of with sbi facility and the services they provide.

Called customer care but they are just helpless as usual and commited me that your issue will resolved in next 10 days. When i asked what the problem is and they simply said no, we cannot say.. You have to contact branch.. If it is like this that they cannot say then how he commited me to resolve the issue in next 10 days..

In worst scenario, if i don't have the enough amount in the account as it deducted twice. Luckily i do have the sufficient money in my account.
But in case i was not having the enough money, then i would have been penalized like hell in ecs bounce case.

This is really disgusting and i want proper justification and reason of the failure.

Thanks
Shantanu dutta