You won't find it on Facebook, email the manufacturer directly they might sort you out of get onto webike to sort you out. As it sits though you have vaguely complained about the company, not shown any pictures of the bad quality or damage etc, gave the world's blurriest photo that we can just barely make out you bought from webike Japan but beyond that... I'm just saying if your seeking help or opinions on here, help us help you maybe?
Many many many people have bought from webike without issue. Your selecting from a massive assortment of products, its up to you to check out those products before you buy them, Google, find reviews, read the reviews and check the rating on webike itself. Unless your particular seat is somehow mangled or got damaged in transit, but without photos etc who can say? Maybe you can get onto it on the freight company or webike to send another one because the packaging wasn't good enough to protect it. But you gotta calmly explore those options before you jump on social media and condemn the whole company because your frustrated.