i lost a player

today at 20h50 tuesday utc i was buying bunch of 80 ovr doku to rank him  up max rank and get rid of small overall. that is because ive all most reach the 1200 limit of the game and fc mobile told me to get rid some of the player. it seem normal until i finish rank up doku and i trained him using the perfect amount of players that i consider need to get rid of. suddenly i came back to check my team to found out that my 114 rated CB hierro had disappeared. i dont know how but it is a lost to my team since i just got 110 harry maguire  and just want to try him out and later exchange but i lost hierro so i cant use anything else. i just want my cb back. please if you are the admin please help me get back my cb