Please help………?

Hello, so I need some advice

Well I borrowed £40 off a someone I know to buy some food as I didn’t have any well I paid her back, I posted the £40 to her via tracked she stating she never got it even though I got confirmation saying it was delivered, well she wants me to give it to her again I said no as why should I? But what do you guys think? Should I give it again as she’s already got it or do I just forget it?
Updates
1 y
I sent the card via Royal Mail Tracked. I’m also not 13. 🙄
Please help………?
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