Moldy chocolate Not even a sorry from Mondelez

If there was a minus I would have put it in. Bought 2 x Slab cholates at a well known 24 hr petrol station. Later that night I ate one perfect next day on opening second one full of mold.Immediately check sell by date still 3 months before date. I contact Mondelez via email with photos wrappers bar codes Not even a sorry nothing only we will investigate very snotty reply from them.