Here is something new to me and I wonder whether anyone has experienced this!
I bought two items from Tesco Direct recently and used the £5 off voucher to get a discount.
One of the items was a present for someone but it was not suitable so I returned it by taking it to one of theTesco stores.
Instead of getting the full refund on the item returned, I was told that half of the voucher value i.e. £2.50 would be taken off, meaning that I would be getting £2.50 less.
Despite arguing and asking on what ground is he able to do this, I was not getting anywhere so I left and went into another store and had no problem.