On 22120 I purchased seedless cucumbers that were marked in store .99 each. My receipt showed I was charged $1.29. Went back for a refund of the difference. The cashier asked a female to override the register so she could process the refund. The female looked at me very skeptically for several minutes and finally waved the cashier an okay to process. I was not pleased with the way this was handled so I asked for the manager. Asst manager Tyler I believe his name was, he was wearing a handwritten name tag and he proceeded to tell me cucumbers had not been on sale for 6 weeks which I am pretty sure is inaccurate. Anyway, I left feeling bad and I spend too much time and money in Lidl to allow this sort of treatment.
Lidl makes it impossible to contact them direct about store issues. For the future they may want to consider that option on the customer page, to report problem with merchandise, employee, store etc. They need to stay on top of these issues. One can contact Aldi for example via their website.
I would also like to see them coach their staff on not trying to school the customer on where and how they think the customer is wrong etc. - but actually provide respectful, friendly service and that the customer is right unless they have a store policy or proof of some sort that the customer is wrong.