State Bank Of India [SBI] — fraud transaction from debit card on 4th april

Address:

560018

Dear sir,
On thursday, 4th april two unknown transactions were made on my uncle's sbi debit card. Without otp the unknown person has debited 9000rs for othpg [protected]www olacabs.com and a second one for 9999rs for othpg[protected]airtel money.
The transactions happened from my uncle's account who is 68yrs old. They are financially poor they have saved the money for emergency and this fraudster has looted them. Please kindly help them. Is there any way to revert the transaction please let us know...