If you need your old number, just inquire about it in Qtel. I think you can retrieve your number but of course without the contacts, atleast those who knew your old number can still contact you.

As i inquire before, you just need the ID that you used when you purchased your old sim. Then you have to pay QR50 I think (just confirm with them) and a new simcard.

Anyway, just call 111 and they'll be giving you the details if you still want to have your old number back.

Ciao!=)