chinese customer service from the OEM side is much different than we are used to in the USA. i don't believe in their culture is disrespectful to not answer a potential client's call. there is so much money to be made for 3rd party latex, there will be a company that gets is on the market soon. with ink, you only get one chance to get it right. release it early and you can never sell the "new and improved!!! and we promise it won't wreck your business this time!"