So sorry to hear of your repeated shoddy Audi experience.
I have just had an indicator light replaced on the boot of my 4.5 year old 18000 miles A3 Saloon.
Turns out there were 7 of the electrical wires broken, which is apparently common, due to bad design and/or materials used.
The cost for repair for the single light was £720 as the broken wires had shorted out the LED cluster.
I too contacted Audi Customer Services to enquire if this is a common issue.
The response was basically that the car is over 3 years old, so not their problem, so didn’t even answer my query and I think I know why.
I’ve owned 3 Audis and 8 VW Golfs over the years and have found that the newer release they are, the more unreliable they have become.
This is just the latest of several failures and for me the last straw, so suffice to say I will now be leaving the VW/Audi brand.
My advice would be that if you are replacing parts, try to obtained anything but O.E.M. as there will be a better chance of them lasting.
Volvo looks to be favourite for me at the moment, so it will be interesting to see how that goes.
A3 REAR INDICATOR LIGHT.mp4