Micromax Informatics — micromax q465 handset

I have a micromax handset model q465 which is under warranty. Its a 4g sim supported volte device. But this set is fail to support jio sim. I have visited the micromax care named shree sai telecom shop no 01, ground floordevi place opposite raj cinema gurgaon.. Contact no[protected]. But the representative neither take care nor try to solve the problem. Reversely he was trying to convince me that is not handset problem its a sim problem. The logic is not accetable at all.
I am waiting for kind attention for this matter.