Free bubbles!!

I bought a leather jacket from House of Fraser yesterday & it was only at lunchtime today that unnoticed they had left the security tag on.
Obviously I didn't have my receipt with me so for them to feel happy enough to remove it, I had to go about proving my purchase with card & transaction details.
That took a bit of time, which was ok, because I do understand. So when I was "really understanding & polite despite their error" & refused car parking reimbursement, they offered a free glass of champagne in the bar in stairs!
It sometimes pays to have manners, be polite & understanding...!