No service on my sim card

My name is Abubakar Auwal kwalam, This is my number that is banned from using airtel network (08025073320). I try all that i can to contact the customer care @ 111 &121 but no respond. The simcard was misplaced in my loggage for loñg, now i got the simcard but no service and am eager to use it.  Pls i want my simcard to be active.
From:-auwal.abubakar804@gmail.com