I'm sorry to hear you were disappointed with your order.
Unfortunately, the Mjolnir you ordered had sold out before I was able to fulfill it, so I issued a full refund for that item rather than delay your order. I understand that was frustrating, especially since it was the item you were most looking forward to.
Regarding the stickers, I tested the remaining stock after receiving your message and was able to remove the backing without issue. I also offered a return or exchange if you had received defective stickers, but you chose to keep them instead.
I appreciate your feedback and wish you all the best.