ReadyCloud failed to upload connection problem

I bought my Model 212 on or about 1/23/19 from Amazon via this page:  https://www.amazon.com/gp/product/B015S0Y50M/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1

It worked fine for a month until this weekend, during which I discovered I could download nothing through ReadyCloud, though I could access the device and navigate through the file structure effortlessly.  Chrome reports an attempt to connect when a download attempt is made, with no further message.

After reviewing these boards, I downloaded and ran RAIDar locally.  It reports no errors.  I then attempted to contact support.  That requires registration of the product.  When I try that, I get the error message:  "The product's country of purchase is not valid."  I have no idea what that means.  An Amazon rep promised to look into it and get back to me. She did not.  (Is Amazon selling used equipment as new?  Or equipment from the wrong country??)

I am not the only one having this problem.  There seems almost no likelihood that this is a hardware problem.  I am using the most recent 6.9.5 firmware.  How can I solve this problem?  How can I get in touch with Netgear--does anyone have a telephone number?  This is a very unsatisfactory customer experience.  I need to be able to rely upon remote access.