My name is Gregory McKenna and I purchased a jammer in February. Unfortunately, the jammer did not work and so I sent it back for a return. I have not received any response from your company. I have attempted to contact an employee named "Lily Wang" who refuses to return my emails. Is there a problem with my return? Sincerely, Gregory McKenna Los Angeles, California, USA I want to receive: Product Spec . Price Payment . Delivery Info . Inventory Info .