Unrealistic results – Football Manager 2020 Mobile Review

How can I have a Bayern team with Mbappe, Rashford, sancho, Bruno, Laporte,L Hernandez, wan bissaka,A Davies, grealish, Saul and De gea And lose to a Bundesliga B team??? How can I get refund because I obviously wasted money...
Review by J. manager on Football Manager 2020 Mobile.