Airtel — incoming is stopped and no action taken by airtel

Address:

Mohali, Punjab, 160062

Dear. Sir/madam,
My name is neeraj kharbanda, my airtel mobile number is [protected], on 25 dec -18:they stopped my incoming calls without any information, my outgoing and internet is working as i have recharged on 3-dec-18 for 499 for three months validity, i complained to customer care but they are not giving reason for incoming barred, i visited to airtel store they told to recharge for 35 rs for incoming, i recharged for 3 times, still not getting calls, then they changed advised to swap same number on new sim, i have changed the sim also still incoming, kindly please help on this, my number is still not working