Horrendous from begining to end!

Absolutely WORST customer service i have EVER dealt with! Spent half an hour on hold to order an item that was listed as not being able to be purchased online. When I finally got someone on the line i went through everything and she refused to proceed without me finding the item number and yet she had no idea where I could locate an order number. Once we had that settled she advised me to hold off on ordering the item I wanted because it was almost a $300 item she said I should sign up for emails and i would get a coupon for 15% off. She knew exactly what item I wanted to order, had the item number and everything. I got off the phone, signed up for the code and waited for my email, once i received the code i attempted to use it on their site and it would not work. I attempted several times then decided to call. This time I was on hold for 1 hour and 49 minutes. The woman who finally picked up the phone was beligerently nasty from the second she got on the line. I explained the problem and she said, well you didnt read the coupon exceptions then! At this point i was at the end of my rope and yet still was able to be nicer and more pleasant than the customer service rep from hsn. She heavily sighed when I told her I wanted her to try it and said ‘my computers no different than yours, if it doesn’t work for you it obviously wont work for me’. I questioned why another representative would TELL me to sign up for a discount if I couldn’t use it, she says ‘i obviously wouldn’t know that’. Eventually she went through the order and tells me that I cant use the code for this order because its only for future orders. Obviously I was aggravated at this point seeing as i could have ordered the item nearly three hours prior without this aggravation and I’m completely confused as to why the first rep would tell me to cancel my order and sign up for a coupon i couldnt use! The rep i’m speaking to begins to seemingly get annoyed and says ‘well would you like to order or not’? I said is there a way you can honor the 15% off coupon and she heaves again and almost shouts ‘we just went over this, you cannot use that code for this order’.
After this experience I will NEVER use HSN for any of my shopping needs, truly despicable!