Croma — faulty airpods

I purchased airpods from croma aurangabad,
After coming home i noticed that there was a disturbance sound coming from right earbud,

I went to croma the next day itself but they asked me to submit the airpods and they will send it to service center to get them serviced or whatever which will take approximately 1 week,
I don’t understand why should i keep them for 1 week, what was my fault if they came out damaged inside the box, even the cap of the case is loose (I ignored that tough) but how can i ignore the technical fault.
Also they will be unable to listen to that disturbance in the store’s high surrounding noise.