Airtel — Last recharge is activated even the previous recharge did not expire.

Airtel !. Hear me.
I did a recharge of 349 rupees when I have 179 rupees pack active. simply I thought that Airtel would allow to remain this 349 pack as upcoming . But it was activated as soon as recharge is done .
It is a plan to suck money from customers. And as a result my validity of 179 pack has disappeared. I had at least 20 validity remaining for my previous 179 recharge. Airtel money sucker demon. You didn't warn your customers about this rule.
Previously if I have done a new recharge befor expiring current recharge the last recharge was seduled to activate after current plan's expiry date.

In the last l want refund of my 349 recharge. Give me the refund.
This mishap has happened with me 2nd time. Iwant refund. Give the refund from where you have debited the money.
My Airtel number: [protected]
Recharge was done from thanks app with account: [protected]. You were paid from Paytm wallet after top up wallet balance