You are so lucky, I took it to the store shortly after I posted on here and they refuse to do anything for me because they said my purchase was over two year and they cannot do anything for purchase over 2 years.
Take it to another boutique and insist on speaking with the manager. This is a known defect. It is not wear and tear. It is due to the glue that they were using back then to attach the lining to the bag. Insist on a FREE repair.