I have a ronin-m thumb controller that I have not opened. I contacted DJI via email to return it within the first few days i got it. It's been a month.  I have made several attempts through email and by calling. Has anyone had any luck?

Dear abe,
Where did you buy the Ronin M? If you bought from online store, please advise your order number.
Where did you send your email? If you sent it to onlinesales@dji.com, please advise your email address or ticket number.
Thanks.