Union Bank Of India — Non refund of cancel transaction of kv fee

Address: 613005

Dear sir/ mam
I have made school fees payment of afs kendria vidyalaya thanjavur student ubi code-[protected] though on line sbi debit card twice vide txn id - ism[protected] and ism[protected] dated 11 apr 2007. But both transactions canceled due to invalid authentication at bank and rs 1800/ debited twice from my sbi account same time.
On 13 apr 2017 rs 1800/refund back to my account against
Txn id - ism[protected] where as another txn id-ism[protected] amount not refunded back till now.
So it is requested that rs 1800/ should be refunded back to my account soon.