Team management issue in game

Hello,

I have encountered pretty terrible issue in my 13th match of Champions Leauge.I could not reach the team management tool, that's why could not change any player in game eventhough my opponent has been changed many times of his players. As the result, I lost that match from 3-2 to 5-3 due to my all players exchausted. I need assistance regarding this matter and remove my last match.