Aircel post-paid connection
Number transferred to some one else

I purchased an aircel number 9803000316. it was on my name. now that number is being used by someone else . i have the bills with me . i called on that number the ring goes and once that person took my call and he told me that he purchased a new sim for that number from the company aircel. i was shocked to hear that. i request them to issue me my number back at the earliest.