Years ago, I purchased a mid-grade stereo system consisting of a receiver, CD changer and speakers. Both the receiver and changer failed within warranty. Since I had bought the system while on vacation, I was required to send the failed parts to a warranty service.
What happened next was basically just a nightmare.
To cover the warranty, I had to send everything, including speakers which had nothing wrong with them, back to the manufacturer. Each component had to go to a separate address

Despite my protests, I was required to send everything back in the original boxes and via UPS.
When I sent the receiver in, it was a 2U four channel receiver. It took nearly six months to get it back. What I got back was a 4U five channel system with the original remote from the 2U unit. Different brand. The company refused a return because of the severe turn-around time pushed the receiver out of warranty.

It was a much more powerful system, but rather shoddily made and a cottage brand. Unfortunately, it did not have any packing whatsoever. No foam, no peanuts, not even a single sheet of newspaper. At least it survived.
The CD changer came back in two months. What I bought was a tray style changer, what I got back was a cartridge changer but it was in the original box. Being within warranty, I sent it back. The turn around time took so damn long that by the time it came back the second time, the warranty expired. The original foam was crumbled in order to fit the differently shaped player. When I got back the box the second time was essentially a squishy bag. The player survived, but I got none of the accessories back. None of the cables, remote, nothing.
Both speakers came in seperate boxes. The box only allowed approximately 1/2" of foam all the way around. The warranty service required
this exact box. When I questioned UPS to find if it met their requirements, it did (got it in writing at the insistence of my father.) When the speakers arrived at the manufacturer, both speaker grill frames were destroyed. One box had the corner shattered. The ---smurfs--- actually hot glued the whole thing back together, making a fantastic mess. Then the fucknuts shipped the speakers back in the same ---fouled up beyond all recognition--- up packaging sans foam! When I got it back, both speaker frames were dust, the same corner shattered again and there were a fantastic number of scratches all over the laminate sides as if they dragged them around on the floor.
It took months to pry a refund from UPS from their insurance department. Because the speaker boxes were rated 200watts each, not very many stores carried them at the time. I had to go to a specialist in the next city, pay the money out of my own pocket and mail a copy of the receipt back to UPS so they could cut me a check.
Before this, UPS used to be awesome. I got piles of ---Cleveland steamer--- through their deliveries, but at some point, they started sucking ass pretty bad.
Now it's all through USPS or, if I absolutely must, FedEx.