Airtel — 4g sim not getting activated.

I want to upgrade to 4g sim. I tried doing the sim swap by way of sms, tried 3 times with different sim but not happening. Then tried thru aadhar card documentation. Still 4g sim is not getting activated. Store guy keep trying, but no use. Store guy said registered a complaint with contact center. Now my old sim got deactivated and new sim is not activated. Now both the sim are not working. Store people are helpless with no option to try further and customer care nos., are also useless with no solution. Because of poor service i think i should switch over to different subscriber. But because now old sim is deactivated and i can't to number portability also.

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