Newegg UPS Rotten and unhelpful service Internet, California

I bought a Audio Technica 95E cartridge off of Newegg for $46. All was well for a few weeks, no issues until halfway through a record the needle snapped or flew off the cartridge or something it scratched my record a little....I send the item back to Newegg for an RMA, because the item is deficient. It should not break like that, all tracking force was set correctly etc.
  Here is where the fun begins. I live around 20 miles from the place it is being shipped to (Whittier, CA) and Newegg sends me an RMA package label to send it back via UPS... I put everything back in the envelope, cartridge, screws, box, instructions.. with the exception of the needle that is missing since it flew off... It's a RECORD NEEDLE. It's lost (I told Newegg this when I emailed about the RMA, I don't think they were even reading any of the emails I sent them).
  Thankfully when I drop the item off at UPS I got a receipt, the guy behind the counter gives me the option of not getting one and I really almost said, yeah don't bother. Thinking this was such a SIMPLE thing. Now I wish I'd filmed myself packing the item and dropping it off.
 
6 days later the item hasn't travelled the 20 miles to its destination. I email UPS and ask where it is, they say they can't help me with my enquiry, I must get Newegg to ask them. I email Newegg to ask if they can ask UPS to see where the package is. They say in a convoluted email that addresses nothing and is unhelpful... NO. I email both companies repeatedly trying to get something to happen. I even join UPS to see if I can request them to look. I can't not without an account number. There is nowhere that information exists.
 
So another, who knows how many hours and hours emailing both comapnies, trawling through the recesses of the internet I find a post saying that an account number is embedded in the tracking number. AHAH! now I can make the formal request that is so obviously needed for UPS to answer my question (It's difficult huh?) of where the item is... Eventually, 11 days later it makes its 20 mile journey... Finally!!

So then I get an email from Newegg a few days later telling me the RMA can't be completed because the cartridge is not in the envelope. Bear in mind the cartridge is not the needle. The cartridge is the item I shipped back. So one of them is simply lying. Either UPS lost my package and did, who knows what. It took them long enough... I could have walked there and back multiple times in the time it took them to drive there. Or Newegg is lying. I have the receipt which says the weight of the item I am shipping is 0.050lbs. Amazon lists the shipping weight of the AT95e as 0.8oz... which is 0.050lbs (Newegg has conveniently removed the AT95E from its site and refused to publish my reviews of it and their service.) If they have not received the cartridge then the shipping weight of the item they have will be less than what I have on my receipt. Which means UPS has tampered with the package. If it is the same then Newegg is lying that it did not receive the Cartridge. All this level of difficulty, of banging my head against the brickwall of their customer service is so draining. Both these companies are just giving the runaround, they are so unhelpful. All I want is to listen to my record player. If I hadn't spend hours and hours and hours of my time chasing them up who knows what would have happened, the item would still be lost... Well it still is apparently. One of these companies, whichever is responsible needs to shape up and take responsibility for their ineptitude. As of yet I still am waiting for the situation to be rectified.