i want to retrieve my old purchase of irealpro with another apple id

Hi, I had an apple id with the e-mail of my job. i purchased with app store ireal pro.

I have been fired from my job, so i changed the apple id for my personal e-mail. I want to retrieve my purchased from app store, but i do not have access to my professional e-mail (previous apple id) any more. How can i get back my purchase of ireal pro if i do not have access to my previous account? Thank you