Wrong contact details on file and not changing it

How is it that I call you guys twice to fix my contact details, read clearly, fix, not update. I was with Discover up until end September 2023 and you had my correct contact information, I changed employers, rejoined Discovery beginning November 2023 but I am not sure where you get the contact info from. You changed my number to a number I used few years, why? The forms I completed and the information on file is correct and up to date why would you change it? I called twice to change it, being transferred from one queue to another. Eventually on the second call my details were fixed, I tried signing in to the Discovery portal now but only to be told that an OTP is being sent to my old number of over 4 years ago. What!!! Your calls are not free, I cannot keep calling you guys.