I think everyone who is complaining here should file reports with BBB.ORG, when you file with BBB.ORG, BBB will send a letter by mail to the company on your behalf and the company BBB record will be affected as well.
Also, its best you post your complaints, scam reviews on other websites not only on DJI because DJI forums are controlled by DJI and they can delete any content they don't like the public to see.
I also think that the media would be very interested to hear about these stories, I suggest that everyone sends an email now to all media organizations with your complaint and a link to this post.
Finally, nothing worse than doing a dispute / chargeback with your credit card company, when you contact your credit card company tell them you want you to dispute a charge on your credit card and provide them with your full complaint story and don't forget to mention that DJI charged you money in advance and originally promised to ship by mid October but then later changed their mind.
I bet you that this post of mine will be deleted by DJI soon as it has too many helpful information for people that DJI may not want you to know, and if it does get deleted then I will be making a new blog and I will post this info on it and get it ranked very high on google less than 24hrs. using my special secret SEO techniques. :)
