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Purchases ingame

This evening I purchased some items from the in game store mistakenly how can I go about reversing the purchased items?
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But if you chose the wrong champ from within one of those Selector's they have maybe been able to swap out which champ it was you had actually wanted to select.
Don't ask for a refund, instead ask for an exchange of item/champ from Selector.
https://help.kabamsupport.com/hc/en-us/requests/new
If it was some other in-game Store purchase (using Units, etc), and you haven’t used the stuff you got from it, then you might be able to ask for Refunded units in that case.