State Bank Of India [SBI] — unauthorised debit or credited in to credit card account

Address:

Anantapur, Andhra Pradesh, 515002

Sir
I have paid through my debit card an amount of 9733&487 (In rupees) on 06/02/2019 towards credit card due.
But on 07/02/2019 automatically debited inr 9733.05 from my sb account [protected]. No messages&no alerts was not come to me. Why this happened? For what purpose it was debited? Is it sbi policy? Why unautherisedly debited? I'm very suffering about this type of transaction. If you not resolve this problem urgently, further i will take next step.
R. Vishwanath reddy
Anantapur -515002