Seems to me that in the flush of buying a new gun (or more than one), it's possible to miss the absence of an accessory. Hard to miss a magazine, but if you see one, you may think that the other one's in the gun, for example, and keep on going - thinking about hitting the range with it, or the other Super Master Blaster 5000 you just bought....
Between you and the store people, though, somebody should have noticed. (The "other eyes" at S&W could have been having a bad day, too, walked away, etc.)
And, yes, it should be the store people who talk to the distributor or take it up the line as needed. This can add credibility to your claim, if nothing else.
The instance I mentioned earlier in the thread - I didn't find out about the
three magazines (two full-cap, one neutered) that were supposed to be in the box until I hit the website.... Double-checked all that and then called the dealer. They handled it....
My credibility at this particular dealer is such that they'd probably have given me the countergirl who handled the distributor-level calls if I'd asked nice. (Just short of "leave the wife and kids"! But her boyfriend was kinda big. As in "use Volkswagen axles for toothpicks".... They eventually got married, and she quit. A good chunk of the clientele went into mourning

.)
I called KelTec one afternoon for some bits & pieces, and the guy didn't even ask for a serial number. I finally had to ask "couldn't I find a way to get a whole gun out of you guys this way?". He said I couldn't.... Hm.... Not even a hint of a question when I had to order a complete "grip" - what they call the whole plastic part of the gun. Dumb thing cracked back by the sear assembly.
NEVER, EVER take the sear assembly out of a P3AT without your prayer shawl, Rosary beads, and some votive candles. A whole new definition of counter-intuitive.... It's also nearly impossible to swap a trigger....
(As long as we're off topic, a buddy brought a new .380 "Bodyguard" to the range last night. He loves it, laser and all, but wouldn't shoot it.... He's a little different

. He's been known to put five rounds downrange, decide he's not having a good night, and leave.)
Back to topic, I've heard a few CS calls, too. I was the Data Processing Manager at a custom plastic extrusions facility for many years, and spent a few years prior working in QC and product design. One holiday morning, being single then, and with nothing better to do, I'd gone out to the office to shake the doors, and get a little paperwork together.
The phone rang, so....
Turned out to be an Architect in New York trying to get some
replacement weatherstrip for a building rehab in Scotland.
We could make this stuff in millions of feet, but generally had a minimum order of 1000' or thereabouts. He needed about 100'.... I explained that, and told him I'd give a memo to the Sales Manager - they could discuss whether or not the order would go through, costs, etc. (Not to mention being able to find some of this stuff at a hardware store if you weren't too picky.)
Sales Mangler (that's not a typo

) talked to the guy in a few days, and they agreed, but noted that because of the quantity, actual production would likely be on a "when we can get some time" basis, and might take a while.
After about thirty days, the architect called
me about every other day.... He couldn't understand that the only influence I had on Production was printing up (but not signing) paychecks....
Reminds me of my brother-in-law. He couldn't stand dealing with the public at an Orange Julius. He's now a funeral director....
Regards,