Customer Reviews Birkenstock Gizeh - Birko-Flor™ & Birkibuc™

I recently bought my first Birkenstock Gizeh Birko-Flor from Zappos. I wore them according to the suggestions given on your site and by reviewers. However, after a little more than a week wearing them for a few hours, I noticed that my knees started bothering me and further on my lower back started to hurt so much that I had to stop exercising (only Yoga, weights, and Pilates) for 10 days. I haven’t had any back pain for more than 10 years. Coincidently, during these ten days the weather was cooler and rainy which made me wear sneakers and closed shoes making me stop wearing the Birkenstock. I am back exercising and no more pain but also no more wearing the Birkes. It is a shame that I paid almost $100 for a sandal that’s so hard to break in and that can impact the way you stand and perhaps your gait and feet bones causing a domino effect in your whole body. And that’s why I am writing to you and see if I could return them for a refund since Zappos won’t accept them without the original box, which I don’t have anymore as I never expected to have this problem. For your information, the sandals look brand new. I would appreciate any help you can provide me. That was the letter I wrote to the Birkenstock people which they never bother even responding. I only gave 2 stars because they are pretty.