Anyway. As annoying as it sounds (and I would have been annoyed too), occasional fuck-ups like this are bound to happen. Mouser probably have millions of references to deal with, and operators probably deal with packaging thousands a day... and given the sheer numbers here, they are not supposed to individually judge if each part should or should not be packaged with any particular care, they probably just follow strict procedures, and the type of packaging required is likely indicated in the database. We're not talking about a small shop here. Given that this part is a bit peculiar (needs ESD protection, but has pins some of which are powered from the inside), I'm not overly surprised this happened. Packaging information for this part was probably incorrect from the start, or at least not precise enough.
Hopefully Mouser's processes are decent, and your claim will trigger fixing packaging information for this part, that's pretty much all we can hope for. Mistakes happen, not taking action to correct them once identified is bad practice.