So, Tesco have responded. I’m not really sure if I am happy with this response…
Thank you for your email.
I was sorry to learn that you were overcharged when you visited our Kenco Ice Cappio store. I can understand how annoying this must have been for you.
I’ve asked our Store Manager to investigate this issue and to make sure that all of the shelf edge labels have the correct price on them in future.
He who will ensure that additional training is carried out with the staff.
Thank you for telling us about this.
If you have any further queries please do not hesitate to contact us at firstname.lastname@example.org quoting TES4343526X.
Tesco Customer Service
I suspect that the next step may be to inform Trading Standards? I don’t think “oh, i’m sorry that we overcharged you and other members of the public for about a month” is a very satisfactory response.
Incidentally, they have now finally updated the price on the shelf.