Ordered a large quantity of custom oil reminder st...

Ordered a large quantity of custom oil reminder stickers after a few months they all started to roll up and fall off customers cars. Sent a roll back and they agreed that there was a problem and replaced them. Again after a few months same thing roll up and fall off. Again sent them a roll to "test" and they now will not honor the sale. Now we have to purchase new machine printers and another company to get good reminder stickers for our customers. The stickers are doing the exact same thing.