iPhone 7 Smart Battery Case peeling

I purchased my iPhone 7 Smart Battery Case on December 4, 2016 and loved it until Fall 2017. My case started peeling apart at the top and on the sides, so it catches on my pocket, in my work bag, etc. and it looks terrible. I've had no issue with the battery itself, it's been a lifesaver on many occasions. I waited too long to take advantage of the warranty, but I'm wondering if this problem happened with others and if it's fixable. I tried to superglue parts of it, but because it needs to be flexible to get the case on and off, it cracked right away.

Paying $99 was worth it until it started to fall apart. Any suggestions on repairing or replacing the skin?