Flipkart — Not able to Login with my Phone Number

I got my phone number in August 2021, before which that number has been used by another person whom I don't know. I haven't used Flipkart till now, but now I wanted to make a purchase and I wanted to signup with my phone number. But when I entered my phone number, it is showing an account already exists, so I knew it was the previous holder who must have used Flipkart two years ago. I do not have any information regarding the previous holder except the fact that he used to own my number before August 2021.
Flipkart does not send me any OTP to login but just shows "Login with OTP unavailable. Please contact customer care", but all those customer care number do not respond to my queries. Flipkart app/website is asking me for the password instead, but I don't know the password at all.
I am the legal and rightful owner of this number, so I should be able to use it to login to Flipkart. Besides, I do not have any other number.

Here are the details.
Phone No. [protected]

Dear Flipkart support team, please help me.