Placed in order and was supposed to receive my item

Placed in order and was supposed to receive my item. 3 days later. Did not receive it. Went to tracking to Check. And it looks like the tracking information was never even updated. Was told that I had to wait for the following week and call again to make sure the tracking info had not updated. Which it did not. Call the following week and ask them to just send me a replacement because I needed the item for a housewarming Gift that weekend. Told me they couldn’t. And just issued me a refund. And told me that I would have to re order it again. I used a gift card. I used 20% discount. I used my Target card to get all the discounts. And now they’re just refunding me a partial credit. It is so frustrating. Why not just send me a replacement. Now, I have to re order to get it fast. I can’t wait to 2 to 4 business days for the refund to Show on my checking account. So now I’m almost $600 in the hole on my checking account.. and they told me in order for me to get my 20% off. I had to order it first then give them a call and they would issue me a refund for that. Like how many refunds do I have to wait for? It’s so frustrating. All I wanted. It was my item. They could’ve just been a replacement instead of having me re order mess with my checking account and lose all discounts. Then have to call again and wait forever on the phone with people that are just being rude example below of when I try to chat with a guy about my whole situation and he said he couldn’t help me and just ended the chat.