Update to my own comment above:
I did contact Apple customer care over phone about this problem. They were extremely helpful and they did listen to my problem. They sent me a new pair of earphones and also the lightening to 3.5 mm adapter. The courier guy takes your old pair back too. Until they receive the old earphones and converter back they do keep the amount for a new piece blocked on your card and will return the amount if your headset doesn't have any physical damage.
By the way, I am in Ireland and here the apple doesn't own the stores, instead re-sellers own the so called apple stores and they are extremely unhelpful. They have excuse for everything and also are not much interested in attending you even if you go to buy something new, so forget help for any problems.
Other way round, I would say Apple itself is extremely helpful and does take care that their customers are satisfied. So I would suggest all of you who are having problems, just contact customer care on call and they will do the needful.
Cheers! 🙂