[4seasons69]

^ this. I agree seems like two separate issues. I would try and figure out the link communication problem first. If you know anyone else that has link and can connect to their car. try your computer and cable on their car and see if it will connect. If it doesn't try their cable and your computer

Also if you know their computer and cable connect to their car try it out on yours. If still a no go probably an issue with the diag port, wiring, or ecu