Got scammed for 500INR

So a guy posted in Indian gamers that he's selling Nioh 2 key which he bought from humble choice.I texted him about the price....he said 500INR, my bad i was tempted to buy and paid him via gpay, after paying turns out to be a duplicate code of high on life instead of nioh 2.It was a mistake on my side as well that i shouldn't be buying games from third party seller for lower price, i guess it's a lesson for me.I don't know how to cope up or get over it after getting scammed for 500INR.I don't know how to spend this day.Feeling bad and disgusted.