If DraftKings took back your winning bet because of "game irregularities," read their House Rules at https://help.draftkings.com/hc/en-us/articles/4405230610067-Why-does-my-bet-result-say-Void-US to find out exactly what they say about taking back bets. This will help them figure out if the voiding is in line with their rules.
Next, get in touch with DraftKings' customer service by live-chatting in their help centre or writing [email protected]. Give specific information about your account and the cancelled bet, and ask for a full explanation of what happened.
If you think that the voiding wasn't fair, get any evidence or screenshots that back your claim. Show this proof to the support team to make your case stronger.
If the problem still isn't fixed, we encourage you to offer your opinions or submit your complaints free of charge on Xolvie.