I got problem almost same like that I withdrawal amount from doha bank's ATM machine and they have deducted 5000QR extra then I made complain through my bank to doha bank and I got that amount in said period I think it was 2-3 days. Just wait for said period by Bank and INSHAALLAAH(Hopefully) you'll get it soon. if not so complain again to bank.
Thanks alot for sharing your problem on QL coz I was going to open an account in doha bank so now I wont..

Q. Did you do that transaction by ATM (If yes) so by which bank's ATM machine?check with that bank also and show that receipt if you have. Sometime it happens coz of ATM machine also, as it happened with me.