State Bank Of India [SBI] — money transaction

Address:

Village - kalyan pur. Post-taldaratanchak. Pin-721435.state-westbengal, Paschim Medinipur, West Bengal, 721435

Today (13/08/19), i made a transaction for transaction through google pay money using my sbi card. But the transaction failed.
But money has been debited rs 2000. Why does my transaction dropped?? What is the fault?

Later on i received a message from sbi as
13/08/19.2000.00 cr, reverse pos pur. Why do this happen???

I dont get it back till now. Plz refund my amount as soon as possible.