Got the Defrost Switch from a member here 
and it’s the right switch but not the problem. My mechanic says he can’t move forward because the company he normally gets a cars wiring diagram from doesn’t have my cars one. So am really hoping someone here can lead me to one that I can take to him or be sent right to him straight up.
Am looking around on the web as well - but thought here’d be my best bet!
My car is now just being turned on every other day for 20mins, as the frost has taken over from the way too cold cold we’ve been dealing with. And my driving it spirit, has left me. 
Thanks for any help!