Lost all my players outside my playing 11 whilst doing an Heros Exchange.

@zx3vmftxyk6u For most of the exchanges there are two rows of requirements - the bottom row often request 20 or more silvers - if you are out of silvers then it just fill with whatever players you have available when you hit autofill (the used in other conditions players)

If you are going to auto-fill exchanges then always check every aspect before hitting accept to make sure it doesn't take players you want to keep.

You can try raising a customer service ticket for missing content, but expect that they will tell you that you selected them in exchanges and pressed confirm.

Easiest way to contact customer service is through the in-game settings menu.