Having faced a fairly similar situation with a Land Rover Defender and a fruitless to-and-fro with BMW SA my recommendation would be to sell the car AS IS to whom ever will buy it, maybe a specialist used Audi/VAG parts dealer and let them fix/strip it. Use the money you get and buy something else (not a VAG).
I'm trying to get some quotes for selling for parts, but unless I can get R50k-R60k for the parts it's better to repair it. I have no idea what is a realistic amount for the parts though.