madden 20 exchange

On Madden 20 Ultimate Team I can't exchange for the 90+OVR ELITE Player Exchange Set. I add 5 or 6 set 90 OVR players and i did not get nothing in return. If i can't get the players back at least give me the set. I wasted 5 90 OVR players including Amari Cooper Combine, Alvin Kamara, Malcolm Jenkins, and others. Is their a way to look into the set and take my players out including that they gave me nothing in return.