ZERO customer service for an expensive product and not resistant to normal use

I bought this protective case mid July to 49.90 price.
After three months of normal use, the articulation of the hinge starts to crack. Two weeks later, the top of the case is no longer at all.
For a product of this price, it is not normal.
So I contacted the seller who said "I'm sorry to hear that you have a problem with this product. The guarantee is 3 months for all our products, so I can not give a positive reply to management application. I'm sorry. "

ZERO customer service for a rather expensive product which is obviously not quality at all because the life is very thin.

Move along. Other competitors have customer service at the top and a much lower price!