3rd pair of Guess Sunglasses broken in the same place - no service from Guess

3 Weeks ago, i posted on Guess Face Book page and messaged them regarding my third pair of Guess Sunglasses that have broken in the same place. I got a very speedy response asking questions like where i had bought them, when, and whether i still had the receipt. Upon responding honestly where and when i had purchased my 3rd pair, i was informed that because i had not purchased THEIR brand in an actual Guess store, they were not able to assist. I responded that it was unacceptable and that going forward i would not be buying any of their products. They came back saying that my complaint would be escalated to HO. That was 2 weeks ago. I followed up last week, and got the same response. It's been 2 weeks. No response or contact from Guess Head Office.