Bought linguist book but have not received it

I have paid for Steves book, the linguist in Traditional Chinese, but I have not received the book. I have emailed the customer support email twice now and have had no reply so I am not sure who to contact. Has anyone else had problems getting a hold of the book after they have already paid? Thanks for any help in advanced

Hi Luke,
I did actually replied on both emails received from you. On February 18th and February 21st. I provided you links to download ebook.
Can you please check your spam folder? You will probably find both emails there.
Just in case, I have just sent you another email from my personal address, hopefully you will get that one.