Twice now, I’ve been to my local Tesco garage and bought a few items, payed with my mondo via contactless, and then been told by the cashier that the transaction didn’t go through.
The first time, I felt a buzz from the phone in my pocket, showed the cashier the notification, and protested that the transaction had indeed gone through. He looked quite confused, but let it go.
This happened again yesterday (same shop, different cashier, also told me my contactless transaction had not gone through), although this time I didn’t check my phone, and paid with my regular bank card. Later I saw on my phone that the transaction was also on my mondo card. So I had paid twice.
I don’t think the merchant is trying to rip me off - different cashiers, and they both seemed certain about the mondo transaction failing. So is there something going on with the interaction between you and the merchant? Seems like some kind of bug on sombody’s end.
The amount was only a few pounds, but it’s a bit unsettling nonetheless.
(otherwise I’m really happy with the card!)