You say that you are getting a js error, when does this happen for you and what are you doing when this occurs? Also what is the exact error message? Please translate it if it is not in English.
In order to help you get your store working we will need to know about what you are having trouble with and need specific help for. Without knowing exactly what you need help with it is difficult to get you the help you need.
As for paid support this is not something that we offer, however you can post in the jobs board if you would like some paid for assistance. Please post back with some more info about the errors and troubles you are having so that we can help you get your store working.