Vishal Mega Mart — I paid 2 time payment for same bill by card then by cash

Address:

Sonitpur, Assam, 784001

I did shopping at vishal mega mart hospital road tezpur assam on 8 sept 2019. Total bill was 960. First paid through sbi card. The person at bill desk told me that transaction was not successful as bill did not generate. Then i paid cash. I informed them that money is deducted. They told me that the money deducted from my card payment will return to account. But it is not till today