Mechanic & Car Service Job - Edgemead, WC, 7441

Afternoon
I have a Hyundai Atos 1.1 ,automatic. I have had problems with the crank shaft, I have it repaired three times by the same guy and obviously not fixing the problem. He had to get engineer to weld something. I have no clue about cars. Would you be able to give me a quote. It has been standing for two months as I just couldn't afford to fix it. Thanks lisa.