Audi A3 sedan 2017 model: Dissatisfied customer

I own an Audi A3 sedan 2017 model. I went to an Audi Hatfield dealership on Thursday 27 May for a normal 135 000km service. One of the issues I had mentioned to maintenance person Thomas was that I had an error that said”headlight range control fault: see owners manual”. Thomas had informed me that my day light, neon light has fused out and the only remedy is to replace the one headlight at full retail price, costing me R18000. I have always been a supporter for Audi from the moment purchased a car in 2017. I wanted to even purchase a Q-series in the near future. Even if you check my previous reviews on Hellopeter. It has always been good reviews. When I purchased the car I thought it would be an investment, I thought I would only spend on wear parts for a long time. I am very disappointed and I will not advise anyone to buy this car as an investment as it will cost you heavily in tue first few years.