Woodland — fading of casual shirt in patch

The product was of low quality. I washed it once and it was faded out completely. I register a complaint on their email id after 20 days of purchase date, instead of taking care of their product quality, they are giving me justification that the product is damage and it is more than 15 days and we cannot help you out. I asked them if washing comes under damage and even asked for special procedure for washing woodland shirts but then they denied to give justification on it.