Xiaomi India — battery issue very

Address:

Bangalore, Karnataka, XXXXXX

First i had a battery with problems as it was old it was not keeping charge for a long time so i went to ascendas park square mall itpl whitefield to buy a new battery,, i went to mobikins shop, i bought a battery they said it's a very good battery,, (S/n:gybm[protected]) original battery, they costed me 1, 500 rupees. Finally the battery quality was not good it was the same like the previous battery. On the battery usually the date of manufature is written it was the same date as my old battery. No wonder the quality was so poor. Please give me justice. They even guranteed me.