very disappointed 6

I ordered this cover some time ago, was exactly 3 weeks very satisfied. But then are broken all corners, hold the phone in the envelope for no apparent reason (or similar falling). I contacted the seller and have within 24 hours receive a return mail that I immediately get a new shell, the old do not even need to send back and very grieves them. Fair enough, now ago 5 weeks, and I still get no shell. After several e-mail on my part with a request for a new Handyhülle nothing did, not even an answer by the seller. I am very angry (the shell has indeed tasted no huge sums, but they should not after 3! Weeks falling apart) and thus absolutely bad feedback on the envelope and the questionable seller !!!