MyUS.com / Access USA Shipping  -  No information of shipping cost prior to sending

I ordered an office chair from Amazon and had the item shipped to MyUS.com Sarasota FL warehouse. The package arrived last March 18. Worried that I have not received any correspondence from them, I sent a message last March 21 to their mailbox on their website apologizing that I have not given them a Pre - alert. I also inquired about my item. No response. The next day, still checking on My Suite if there are any items, having none, I sent them another query. I even called and left a message in their voicemail I tried the What's App they are touting about, I received a response after 6 hours and of course, I have hung up already. March 23, I received an email that the item has indeed arrived at their warehouse and will be cataloged, photographed, and will inform me if the package is ready to ship. On the same date, I received a description of my item they valued at $350 with an apology that they have an outage and some data were lost. Packages may be delayed I checked My Account and still no info. March 24 came and I was surprised that they shipped the item already and charged me $28015.28 for shipping costs via DHL. My complaint is, how come I was not informed first? Had I known that the cost will be prohibitive, I would have gladly just donated the chair to one of their staff. I sent an email asking why that happened and the reply I got was the membership that I signed for states that any item they receive under my account is shipped immediately. And I should upgrade to a Premium Membership for a more pleasant experience. Now I am stuck with a $2015.28 bill with my credit card