Collection but no replacement

We bought cappuccino boxes, only to find that once opened it was a different flavour inside, we opened another box and same thing. We contacted Nestle and informed them of the issue, we had 7 boxes of the sam batch number so assumed they would all be the same. They collected all 7 boxes two days later and said they would get back to us but have not hard anything, it is now heading for two weeks with no outcome.