Airtel — airtel 399 plan is showing only after 349 recharge is done

Dear team,

₹399 airtel prepaid plan is not showing in the available plans. Hence last month also recharged with ₹349. But once the transaction is complete, i can see ₹399 is visible in available list. Hence airtel is only showing ₹399 plan, when i don’t require and they are not showing when i require (On last day of my existing plan).
It’s a clear fraud incase in case if that have plan, they should enable this plan every time.

Looks it time to switch to jio, i have been using airtel since 6 years.