Hello on giztop.com there is an advertisement on bottom right corner where if you sign up to newsletter they give you a coupon for 5% off. However upon signing up they only sent a 2% coupon not 5% as advertised. Who do I speak to so I can get the 5% coupon as has been advertised? I have tried contacting customer support but no response. I am very interested in buying a phone but will not buy unless advertised 5% is honored, how do I get help with this matter? Thanks.