Bests & Worsts Reviews from Amazon

Very disappointed. I had the fire tablet HDX for several years and loved it. Especially for travel to download my content for the long flights I have to take. I received this a few days ago and so far for the main functions I purchased it: 1) Cannot remove the subscriptions as it errors out every time I try (even though I bought that option). 2) Cannot purchase many titles even though I can on other fire devices - no option is even present on this tablet, "button" is missing in interface. 3) Cannot stream or download some of the items I have purchased (seems intermittent, although works perfectly on my other devices). Again, "button" is missing from interface. 4) Cannot seem to stream or download any prime shows (again "buttons" in the interface are missing and it just says "unavailable" next to the episode number and title). Works fine however on my other fire devices. Called customer service. First time was disconnected. Called back - did 20 something "fixes" / investigations (reset factory, stopping app/clearing data, etc.). They connected with "Mayday" and were equally as perplexed. Seems it needs to go to the developers for further investigation. (Note: Customer Service rep was very nice. Just frustrating it couldn't be fixed.) Then it seems the development team doesn't work on weekends so earliest to even look at issue would be Monday. I went ahead and bought this as a replacement to my now defunct beloved HDX version of an earlier fire tablet (which I still am frustrated they refuse to make anymore). It was to be for my trip overseas starting tomorrow so I would have some content on the long plane ride, but now I basically have something fairly useless. I have had good experience with amazon devices (kindle, fire tv, echo, etc). This however was a big disappointment and still not working. It really doesn't matter if it looks nice or its fast if functionally it doesn't do the most basic things it is designed to do. ** UPDATE June 14 ** Still not fixed and I got an email yesterday from Amazon Customer service advising me that the engineers indicate I should do a factory reset and restart my modem. Amazon you are kidding right? Did anyone on your "engineer" team even read the extensive notes taken during my first calls to you documenting all of the 20 things we did (including TWO factory resets). Did you even see the scren shot the first amazon rep took? Really really sad support folks. Will be sending it back. Not as good as my old HDX in form or function, isn't working, and the support is severely lacking.