Apple ID is not valid or not supported for my 5 years old account
I had created an APPLE ID Account in 4/26/1017. I last login in march 2019 using the apple id. Then i created a new apple id account and since have been using the same new ID. Today after many year i tried to login to the old APPLE ID and it says Apple ID is not valid or not supported. I had some old documents and pictures in that icloud but i am not sure how to get access to those. I tried calling the apple support and they suggested the account is no longer there. I can not believe that APPLE can simply delete my details from Apple icloud without informing me. Please suggest how i can retrieve the 5 GB of icloud data that was associated with my APPLE ID