iTMS support: reactive and efficient

Couple of days ago, I purchased an album from the iTMS but I was disappointed with the quality of the encoding, so I sent an e-mail to iTMS France.
The First answer I got was out of topic. So I sent a second email, describing more precisely why I was annoyed.
Hereafter is the answer:
Dear Pascal,
We are sorry to learn that one track or one album that you have bought from the iTMS was not fulfilling the quality level that one might expect from the iTMS. We are taking great care of the quality of our products, so we will investigate further the problem you have reported to us.
We have already initiated a bank transfer to credit back your bank account for the corresponding purchase, and it should appear within 3 to 5 days.
Please do not purchase this title or album within the next 2 weeks. It will give us the time to solve the problem or to remove the faulty title from the iTMS.
We hope that we will remain an iTMS customers despite this problem.
Best regards
The iTunes Music Store Team
My account was indeed credited back and I think it is good customer service. I've been an iTMS customers for quite some time already and my complaint was really driven by the unusually poor quality of this album.