U. S. Polo Assn — trouser quality issue

Hello sir i bought this trouser ustr0469 from store in trilium at amritsar. I have washed it for about 5-6 times and it has started showing so many white spots. One doesn’t expect such kind of quality issues when it comes about a brand like this. I can’t wear this anymore. Kindly consider this issue and please provide me with an alternative solution because we are paying a huge sum of money to buy these clothes and in return we are just getting a poor quality stuff.