I paid residence tax on the same payment slip

This was stupid of me. I paid my residence tax using paypay app. After I scan the QRcode I saw there was a warning. It was in Japanese not paying attention I ignored it and proceed to paying it anyway. After paying it I realized I already paid it. So I paid twice on the same slip. The slip I suppose to pay is the same amount. I'm thinking of going to the ward office and talk them see if they can transfer it to that bill or have them refund me. If anyone had the same problem or other suggestions please comment.