Yes Amazon Prime definitely isn't perfect and this does happen occasionally, if this was the only problem however it wouldn't be too bad. Because my flat and the people living nearby are sometimes hard to find because the Sat Nav makes it look like we are about 200 meters away up the road when we put in our address correctly they sometimes don't find us and they say we weren't in when we was without putting a card through which proves they hadn't been here. In fact even worse my neighbour had an expensive parcel given to someone up the road he didn't even know once, luckily he managed to get it later, but the guy could have just kept it leaving him demanding a replacement that probably would have been a battle even though he would have been legally entitled. On another occasion a camping heater came via Prime very severely damaged and unusable with a massive dent on the top that had compromised the outer casing making it dangerous to use, he complained immediately and asked to return it for replacement and amazingly the seller refused, he filed an issue with Amazon and even though he is legally entitled to a replacement under UK law or in fact even a refund on request, Amazon have also refused and the seller incredibly won the case. He has now appealed and has stated the law threatening to report the clear breach of his legal rights to trading standards if they still refuse to replace it soon and he is still waiting, it's now been over 2 months since it arrived in that state and it looks like they will need reporting to trading standards as he isn't getting anywhere. It's unbelievably bad and quite shocking that Amazon are illegally supporting a seller who is clearly breaking the law, so they can't be trusted as this has proven.
Ebay can however be even worse still, once my friend received an illegal counterfeit "Sony" memory card for his camcorder that was supposed to be made by Sony and despite proving it was illegal without the proper hologram that was instead just a 2D copy on the counterfeit and that the seller was committing a criminal offence by knowingly selling them advertised as "Sony" as his business, Ebay kept supporting the seller when we complained and continued to allow him to trade illegally, they didn't want to know and Ebay were also committing a criminal offence once they were informed by continuing to allow him to use their site for his criminal business, we stated this and Ebay still allowed him to trade and just asked us to return the illegal item to the seller so we'd have no evidence and he could illegally sell it again, this was unbelievable advice. Even the camcorder kept complaining that the memory card wasn't official and it was such awful quality that the camcorder kept intermittently giving errors when accessing it.