Complaint

I brought my vehicle in for a noise from the left front wheel on 01 April 2015,reference ***7, i suspected it to be the cv joints. The inspection was carried out and was informed that it was my cv joints, i requested that all cv's were to be replaced. The work was done on my vehicle.Three weeks later i heard a noise again coming from the left front wheel, i took the vehicle again to them and was informed that the inner cv was the problem, i asked why that had happened, they said they only replaced the outer cv's and not the inner cv's, it is their job to do a proper inspection as i did request the cv's be replaced. Now i must have the job done again at my cost.