Having problems with tandem pump in my 2.0TDI A3.

I was losing power when accelerating so took it into Audi who said the tandem fuel pump had failed. Audi have recalled 15k units for that problem but mine was not one of them, wrong chassis number apparently. Anyway this problem has made my turbo fail resulting in a £2500 bill!

When questioned over the nature of the failure Audi told me that a fuel leak had occured which contaminated the fuel system. This is the same problem that the recalled Audi's were suffering but they are refusing to acknowledge that my failed pump is related to this recall.

Has anybody suffered from this problem or had a faulty tandem fuel pump that has not been on the recall list?