Dell India — battery send for laptop is non dell battery hence applied for refund

Address:

Bangalore Urban, Karnataka, 560001

I had purchased a laptop batt for my inspiron 5521 from dell with the advice of a tech support staff rehan ansari from dell but when i visited the service centre here in mumbai and gave the laptop for repairs the outcome was different my batt is ok and the laptop is working fine now after some parts replacement and i have already send the batt to the dell dealer in delhi vidur india ltd and also paid rs 300 extra excluding the batt cost of 3500 and returned the batt to the delhi but it has been more then a week and i am not getting my refund or call from dell i was told tht we will give the refund so now pls help me in getting my total refund of rs 3800 and also take a serious note of the way dell cheats the customers with there careless attitude