Device Access Paused For Multiple Sign Up

I have been unable to use my FamPay account on my Android device for about one year because the device access has been paused due to “multiple sign up”. When I try to open the app, I see a “Device access paused” message stating that, due to security policy and multiple registrations/logins, my device has been blocked. My current phone number linked to this device is 6362529***. I no longer remember my first SIM details and therefore I am not able to complete the usual verification or recover my previous access on my own. I have already tried contacting support through the option shown in the app, but I still have not received a solution. I kindly request that you review my case, remove the device access restriction related to multiple sign up, and help me sign up or log in again with my current number so that I can use FamPay normally.