Relinqution

Hi, I played PRO back in 2016 and recently came back. I did not know that I could merge my old account, thought that I lost all of my progress, and started a new journey. I have gotten pretty far on the new journey, but I was wondering, is there any way to merge the old account with my current progressed account? My old account was on blue and my new account is on gold.

How much?

Buying an eevee with good iv's. Planning on evolving it to Umbreon.