FamPay Account Inaccessible After Lost SIM, Need Mobile Number Update

I am unable to access my FamPay account after losing the SIM card that was originally linked to it. I bought a new phone around eight months ago, and after that my old SIM was lost, so I can no longer receive any OTP or verification on that number. When I try to log in to FamPay now from the iOS app, it shows an error saying that the number is already linked to another account, and I am not able to proceed. Because of this, I cannot use my FamPay services at all. I tried to enter my details again, but the app still does not allow me to access my existing account or properly set up a new one. I request your support to resolve this issue by helping me create and use a new FamPay account with my current mobile number and device, or by updating the registered number in a way that allows me to use FamPay again. I am ready to complete any identity verification steps required so that this problem can be fixed.