Xiaomi India — redmi 5a charger issue

Address:

Chennai, Tamil Nadu, 600003

I bought the redmi 5a last week from redmi store in forum vijay mall, vadapalani, chennai.
Whenever i used to charge my phone from providing redmi charger, it should take 4 hours to charge. I thought first time its should take time. But one week is gone still am facing the same issue, charging time should take 4 hours.

Nowadays other company charges should take less then an hours to complete 100%.

Kindly replace my charger and provide a good quality, high speed chargeable. Otherwise refund my amount.