completely change the interface wordpress themes

I need someone who can completely change the appearance or interface of a premium wordpress theme with 20 different views that I have provided an example. all the original functions of premium wordpress themes that will be changed must remain intact. display only theme that must be changed. the point is a theme converted into 20 themes with the same functions or systems with different views. and each display will have several colors that can be changed by selecting its skin or CSS. we will choose the best offer and in accordance with our criteria. we will only pay you after we get the results of your work and check it out. we will not pay advances, but it really will pay you after we receive your job. if you are interested, please PM me