I ran into some surprising expenses many years ago. The deal was that the local UPS store was a franchise store instead of belonging to UPS. Several things were substantially higher if I went through the franchise store than if I dealt directly with UPS.
You know that free shipping isn't free, the shipper is paying and it is in the price of what you are buying. When you think about it, there is no reason for shipping not to be charged back to you if the only reason for not purchasing was that you changed your mind. Likewise free or low cost financing, somebody is footing the bill. When you go as far as you did on a purchase and then change your mind all the processing fees fall on you. The loan may have gone through and Seyberts been billed for all of the processing and a few days interest.
If you look at it from the seller's standpoint it mostly makes sense and might all make sense. Profit margins have gotten razor thin and losses are being charged back to customers more and more. Simple reality, a business has to make a profit to survive. Is it fairer for you to pay for changes you decided to make or all the rest of Seyberts' other customers have to pay?
People used to come into my business on a pretty much daily basis wanting to trade things for my used auto parts. I told them I would trade, but I wouldn't trade even! In the mid-eighties my overhead was between fifteen and twenty thousand dollars a month. Trading even was just like selling at cost. If I did either one I wouldn't be able to keep the doors open three months. Too, they were wanting to trade something they didn't want for something they did. Most of the time what they wanted to trade was going to sit on the shelf for months or years, I might toss it for scrap.
You are annoyed. When you cool off and look at things fairly I think you will realize that there is no reason for other people to take a loss because you changed your mind. If the cue arrived defective or damaged and they couldn't promptly replace it then you could expect them to eat some loss. However, they are going to keep making their margin so the costs of eating the losses has to be passed on to other customers along with all the other costs of doing business.
Best I recall you had a storefront business so you are well aware that nothing that you described as free really was. "Free" stuff just goes into the overhead. Net is pretty fixed when the margins are thin so other customers pay for any freebies anyone gets or like original shipping, the freebie is built in the price of the item.
Hu