Someone stole my money using access of my UPI without my permission or otp

I had already paid for a courrier service offline so they called me and said there was an issue in the address of the recipient to change that I need to enter the new address in a website and provided me that in WhatsApp along side a payment of 5 Rupees, beyond my imagination when I did that I lost access over my mobile texts and my upi got auto accessed, there are multiple texts from multiple numbers during the transaction and the transaction is not even showing in my upi transaction list. I went to bank and blocked my account temporarily, they said to register a cyber complaint, hence I am writing this in expectation of getting my money back that I have been scammed of.