Trai — wrong recharge

Address:

Pune, Maharashtra, 410506

Dear Sir,
This is about my prepaid no.from Airtel. It has been active with me for many years but I had to travel abroad to my husband last year. I had recharged it last on 8th August 2016 and switched it on and off many times this last year. But After I landed back and recharged it for Rs. 500 thinking it is still my no. as it was for so many years but to my horror this number is given to someone else.
Anyways I know my number cannot be given back but can a refund be made or a recharge be done to my alternative Airtel number.