You're missing the point here. Instagram is a form of advertisement for JE, not a public forum for customers to discuss product quality. If you wish to get the problem resolved, contact customer service. If you wish to talk with other JE customers, use StyleForum. Attempting to publicly blast a company that has already addressed your issue on their own page isn't going to get you anywhere. It's their page, they may allow or disallow whatever they want.
Assuming all Kake Mocks (and in turn, all JE products) are defective because your product happened to be faulty is incorrect. My Kake Mock is holding up fine after what must be 50 wears now, and I have never had an issue with any of JE's terry products. You got a bad apple in the batch, and JE's customer service is known for taking care of those bad apples. If you're upset with the way you were treated, feel free to discuss that here, but don't attempt to smear the company on their own form of advertisement.