Pokemon Cards switched

Hey guys so I sent my first set of 16 cards out to PSA through my local GameStop. After waiting 45 days I’ve been informed my cards were graded on the GameStop app. After looking through it two of my cards are not listed one my Japanese Umbreon From terastal festival and my 151 bulbasaur. In place of those I got a Japanese Jolteon and a Japanese Ceruledge ex. I’m just wondering if anyone has experienced this same thing and what you ended up doing to get it all resolved. I talked with GameStop and PSA but GameStop is the only ones that can try and help me. I’m very disappointed that I may have lost my Umbreon. Let me know if anyone has experienced something similar when sending your cards out with GameStop or just straight with PSA or any other companies.