I dont hold that much confidence in sky, yet I cannot ciritcise as I am unfamiliar with both.
I would say disconnect your router and whilst its in the same room sort out connectivity to that before you move on.
To do this you need to be able to get to the router menu which is most likely on
http://192.168.2.1 or
http://192.168.1.1 (put these addesses in a web broswer to acess your router configuation). Once you have that stable you can get to getting your internet stable.