Stale Wafers

Was doing my monthly grocery shopping & Spar had a special on the Nestle counterline bars.. it was 3 for R20 .. I purchased 24 of these bars as i take them daily to work & give them to my kids as snacks. Out of the 24 bars 21 were Tex & were only due to expire in Jan 2021. The wafer of these chocolates were stale, to a point were it tasted as if I was chewing wet paper. I took all the chocolates back to the store to return as I opened every one of them to show how stale they were and to my surprise the manager says they opened he can't do much I need to call the customer services. I called customer service a lady was supposed to call me back and she didn't.. I have 21 Tex chocolates opened and staled!! Surely there's a problem with the batch