State Bank Of India — money deducted from my account without my knowledge

Address:

Visakhapatnam, Andhra Pradesh

i have an account in your SBI at Y.D.Peta (SBIN[protected] andhrapradesh A/c No. [protected] Name : Penigantla Lovaraju Date: 27/03/2015 Rs.7013.72 on POS 2002 at IRCTC Txn# no[protected] Date: 27/03/2015 Rs.4373.72 on POS 2002 at IRCTC Txn# no[protected] Date: 28/03/2015 Rs.1202.49 on POS 2002 at IRCTC Txn# no[protected] Date: 28/03/2015 Rs.4013.72 on POS 2002 at IRCTC Txn# no[protected] Date: 28/03/2015 Rs.4053.72 on POS 2002 at IRCTC Txn# no[protected] Totally 20657.37 dudcted with in two days. Plese helop me how to return my amount.