HDFC Bank — open rd account without account holder permission

Address:	Chandigarh, Punjab, 1600101
Website:	netbanking.hdfcbank.com/netbanking

Every morning i usually check my account balance through net banking. On 21st dec 2017 when i was checking balance it shown me balance 2000 less than expected. Then i request for account statement then i came to know on 17th dec 2017 rs 2000 was deducted for rd account via atm. When i check my account balance on 18th, 19th, 20th it was correct but suddenly on 21st dec it got deducted and shown me rd account transaction done on 17th dec 2017.
Then through net banking i liquidate rd account balance to my saving account. But i was shocked that bank can transfer your account balance to any other account without account holder permission.
But i am still in doubt whether my rd account is closed or not. I called customer care team of hdfc but they told account is closed but i am sure they will deduct amount in next month also.