Pool Shields Refund

Skarlett_Witch

I clicked on an offer and it was automatically purchased in-game

SummonerNR

Submit a Request for refund, directly via Kabam Support (NOT via your bank, credit card, or Google/Apple)

https://help.kabamsupport.com/hc/en-us/requests/new

(and removed your other duplicate, was posted at same time as my suggestion for you here)