Ordered a pair of sandal on Nov 19. They sent me the wrong color. Contacted customer service and took them more than 3 business days to reply (after receiving my 2nd email). Tried to call the customer service number to change the size and was put on hold for more than 2 hours before I hung up. Emailed customer service again showing her the screenshot of my hold. Customer service confirmed they will update the size. Did not receive any tracking number of the replacement shipment at all. Contacted them again on Dec 10 and then Dec 15. The reply received on Dec 16 was "I just looked into this, and the item was unfortunately cancelled. I am looking into our wholesale side to see if I can find a pair to send out to you". Terrible customer service. Don't buy from Birkenstock.com. Buy from FootLocker or other retail shops. My purchase was supposed to be a gift to be given out on Dec 11. So glad that I bought another pair from Footlocker as a back up.