Good day,unluckily they don't repair such items in Qatar,but you can buy them from many spare parts shops and for a window motor you don't have to go for the original,just buy it for half the price plus the labour charge for installing it.Try Hammamco shop at Mugalina or Alfares near the Jaidah fly over,or otherwise go to Bin Mahmoud street where you can find a lot of auto electricians shops as they may help you with it plus there are a lot of spare parts shops at that place. Good luck.