Design a 3D layout . Maybe give 2-3 options of what it could look like

I have a small phone store that has been changed around twice . I'm still not really happy with it , maybe because it is a small store its harder for me to put it together and be happy with it , based on the way its built . I need someone who can put together 2 maybe 3 options of how the store would look if we arranged it these ways . The design concept can totally be up to you , I may make some suggestions based on me being there and knowing what I like . I would also like you to suggest colors and schemes , I'm looking for someone with an open , creative mind who can see potential in something and give constructive criticism while helping me find something I can be happy with . I do not need nothing fancy or anything that would be too time consuming , its a small store and theres not much to do with it based on the size and what space we need . Just simple layouts and colors .