Why did you think you brought in "the wrong champions"? Those quests are so easy that you can either explore the quest with maxed out 4*, or put it on auto-play with 6 above rank 2.
Send a ticket to Kabam's support department.
https://help.kabamsupport.com/hc/en-us/categories/360003410932-Marvel-Contest-of-Champions/
also curious how – with a 5 champ team, you had the “wrong champion.” 😟
I learned this the hard way a while ago with a different quest that required currency to enter. Open a support ticket and hope for the best.
You can bring in the worst champions and still do it so i call bs. You just accidentally quit out
Kabam designed the daily quests in a way that Thronebreakers and above can just put the automatic mode, without troubles. If you are Cavalier, play them really.
If your champions were 2*, 3* or weak 4* or 5*, then yes, you had a problem.