You can call Karwa, one day ahead of your trip to Najma. Let them know the pick up and drop off point, that's if you want to get a taxi. Then call them back for confirmation, an hour ahead of your errand.

If you like some pieces at Haraj, I think they have their trucks to load your stuff. I am not sure if this is a free service, or on your request, which means you'll have to pay for.

Salam