Finally, they suggest I contact retailer. It will be a miracle if the Supermarket refunds a gift card with peeled off code cover. However seems more likely than Google doing anything. Meanwhile I can't buy MyWrite Nebo Notes which is 3rd in productivity rank.
Another person tried on a supposedly working account. Didn't redeem.
I will show the supermarket all the emails and write to various authorities. Atrocious behaviour by Google.
Nine days.