I recently bought 2 T-shirts + 1 umbrella combo from Star CJ (it was listed in some forum in Desidime)
Received the product few days before.
The T-shirts are absolutely horrible. Not even worth Rs.20/30 that you pay street-hawkers.
Also it is not pure cotton as they claimed. It is cotton+polyster mixture.
I interacted with customer service team multiple times.
The final answer is that:
They cannot exchange or return.
I hope this feedback helps for anyone who want to interact with Star CJ in the future.