I bought Chanel classic medium beige lambskin last August 07. I placed an order by phone at Saks another state to avoid paying tax. Using about 2-3 times, I just find out that the stitching on the bottom corner was starting to come loose. I tried to put it in by myself, but now the thread was entirely out. In this case, can I fix it at the Chanel boutique because there are no Chanel shop at Saks in Chicago. And what else should I bring beside the bag (authentic card or receipt)? Are they going to lose my dust bag or authentic card? Since I read some thread, some people lost their dust bag and authentic card after they did bag treatment or after fix their bag. I am afraid of that will happen to me.