I faced the same thing once had an argument with the neighbor for a pitbull he tied outside my room without food and water and bruises all over. I took the dog and gave it to a friend but then my neighbor promised he will take care of it though he later gave away the dog when i got it back for him.

Contact QAWS and ask them for a solution, if they are willing to accept the for sure unregistered dog then let me know.

Ask the owner if he wants to sell it, if yes ? Pay him and transfer the dog to QAWS. I can help you in sharing the cost to buy the dog and transferring it to QAWS.

Cheers