Whatsapp unreliabile

After using Whatsapp for more than 15 years, suddenly I get a message that it have to be updated. When I try to update I am asked for the password for an email address I stopped using more than 10 years ago. I could not get the password and my Whatsapp expired! When I contacted Whatsapp Support I was notified that they will contact me in working days. Not good enough. In the meantime I switched over to Signal with no problems. I would have liked Whatsapp Support to solve the problem immedaitely.