Samsung Z Fold -4 5G Unlocked (Refurbished)

I purchased this phone and have been using it for 5 months. All of a sudden the front screen started flickering on and off randomly. This was NOT after a drop or any kind of physical misuse. Over the next three days the flickering became worse and then on the fourth day the main folding screen went black - completely dead. I attempted to factory reset to see if that fixed the issue - no go it would turn on for less than 30 seconds, then hiss static loudly and shut off. While I was trying to verify my warranty it stopped making notifications, then it also stopped making calls, then it stopped being able to take calls... This phone all of a sudden after 5 months of regular use suffered what can only be described as catastrophic hardware malfunction.Over the next 3 days I was contact with Samsung customer service, sending over my warranty documentation more than 5 times - I kid you not. The issue is that the amazon renewed warranty is 90 days and for some reason that overrides the fact that the phone has a year long warranty through Samsung. I sent my documentation five times to three different agents and even though it showed as in warranty on my end (from the original documentation i sent through the website) each agent somehow could not see that the documentation that I sent in. I spent over a week with Samsung customer service arguing the fact that they were incompetent and my warranty was valid.Now I am still in a fight as it is showing a repair estimation and still showing as out of warranty - whether through the amazon renewed warranty issue or whether they're sayin it's physical damage (I repeat the phone has not been dropped, the catastrophic issues started randomly) I will never buy another electronic from Samsung - Their customer service is the most appalling thing I have ever experienced - and I will be moving to a different device without repairing my current one if they insist its related to physical damage.