Sorry to read about the issues you are experiencing.
First of all, I would check to make sure you have enough compressed air pressure running to your machine. I’m sure that this isn’t the problem but check and rule it out.
Error E0447 in my experience points to your axis stepper motor encoder. That would explain all the error messages you’re getting. If the machine doesn’t know the position of your spindle (axis motor encoder) then it can’t pick up tools or mill properly.
Get in touch with whoever you bought the machine from and have them remote diagnose it for you.
Best of luck.
Thomas.