Product is good but..

Just imagine one customer (me) purchased one Cat mobile S 52 model ,place was Mumbai and I paid sixty nine thousand in Indian rupees When I inserted one leading service providers sim which was active already in use in my previous mobile branded one And found it's not working
What was the worst thing in this whole scenario seller didn't share Indian sim card will not work
I also spoke to manufacturers and they confirmed this was true.
After four days (before return expiey date) returned to seller physically and collected my money back.
This message is specifically for manufacturers and distributors, why this mobile is being sold in India ?