Bought plus twice

I bought PS+ twice today by mistake. Is there any way that I can get a refund?I was gonna buy P4G with the money left after I bought plus :(

Second 3 months....Well, No P4G for me then lol. Atleast now I can waste the money on smaller titles :I

Question: I purchased the Amazon gold box deal that comes with 3 free months of Plus. It comes with 3 separate codes for each month and when I redeemed one it says that it will automatically charge me for a 3 month once time is up. 2 question: will they notify me before my free trial is over and can I redeem all 3 months at one time and they'll stack?DRAGONPIECEZ