Bad service from vw Polokwane and VW SA

Good morning on 12/05/2022 I bought a new polo vivo hashback from Polokwane VW when I leave tare road I hear noise from front wheel then I stopped called salesperson about the noise then he say I must return it tomorrow for check up but they didn't find anything. But noise still there when I drive on gravel road and I return it again then I drove with technician the technician comfirm that there is a something wrong then he took it to workshop but he didn't find fault he released the vehicle but he say I must bring it back I did return it for check up but they released with the same problem the on 20th I return it with spare key I'm still stucked they don't want replace the vehicle. How can I drive the vehicle that have fault and there technicians fail to find fault