Mr Services Pvt. Ltd. — Payment not received

Address: top floor third cabin of M&B Associates building near RBL bank

This is the email i rceived from them:

Greeting a nice day,

Dear
Dhruv Negi,

As per conversation with the account department.
This is confirmed mail from Marcus Recruitment Services Pvt. Ltd. that refund date of your retention amount (INR 10, 500/-) is fixed 20th of April 2021.
Timing 4:00 PM to 6:00 PM
Please share your payment mode :
Paytm
Google Pay
Cash
Phone Pay
Account Transfer


Thanks & Regards:
Accounts Department

But till now no refund is initiated yet and their number [protected] shows temporary switched off. Please help