PhonePe — instead of credit my account got debited

Address:

560103

Dear Sir/Madam,
today i registered to the Phonepe account for the first time to received an amount of 20000 from a person who claimed me as a Army person named Sanjay Singh Phone number +91 [protected] and Phonepe Account Number in the name of MARY SHYLA . the UPI transaction number was[protected].
being a first time user and and person called me in peak working hour saying please receive the request soon just accept this fast else transfer will be failed .and instead of he transferring me money he took credit of 20000 rs. from my account . request you to please help me with this fraud case and if can get my money back