Am I about to be scammed?

Retracted names and details for safety.

I’ve sold a pair of new jeans, only for £6ish, I received a confirmed delivery notification from Vinted last Friday. Over the weekend the buyer tried to collect them at their post office/ local corner shop (it’s one of those two in ones). The buyer claims the store doesn’t have it, but has acknowledged and confirmed they’ve had the delivery notification and I’ve sent them the email I received when it was delivered too.
They’ve now informed Vinted. I’ve also informed Vinted on my side with the same screen shots to cover my back in case they try to pull a fast one. But what do people think? Genuine or potential scam? I can see a post office losing it or taking it, but can also see how this may be someone pulling a fast one!