This is not the best way to go about things, since you are trying to promote a service in here try as much as possible to be absorb whatever criticism or suggestion from others here since they are you potential client's.
Am not saying you don't have the right to be upset with others' comments but you can reply in a more civil way that will attract respect and trust that you know what you are doing.
This service may look unfamiliar to many of us here so there may be room for misconception and doubt most especially coming from a newbie.