poor service delivery

if there was a half star thats what i would rate them. took my car for service on 20 march 2020 it was on friday, after i collected the car on my way home i realised the sound of the car has changed.i phoned them on monday to explain the matter and they asked that i bring the car the next morning which i did,they had the car the whole day and they came to deliver it at my workplace around 4:30 pm saying the matter has been fixed, i got into the car and booom..... nothing was done, i followed them to the workshop to ask exactly what is it that they fix bcoz the same problem which made me brought the car back was still not fixed, i drove around with one of them so he can hear exactly which sound am refererring to and he acknowledged that it was not what they fix, they asked me to bring back the car again the following day, we had a funeral so we had to leave to Mpumalanga, we left the car by the workshop so they can fixed it that was on wednesday 25/03 and i asked them to drop the car off at my workplace,friday morning they phoned me to inform that they going to drop off the car bcoz its fixed, okay on sunday on my way back we passed by to collect the car boooooom the sound is still there and the are now closed for lockdown, had to make means on how to get to work as am an essential worker i dont feel free nor safe to drive around with the car.

on 11th May i went to the workshop to ask why the brought the car back while it was not fix and the guy denied that the car was never brought to them on 25/3 luckily the lady at reception reminded him that the car was there. he then said i should bring it which i did on 12/05, he had the car from 8 am i got there at 3 pm to collect the car and he was still busy with it,i waited for him to finish, he came and gave me the car keys and wanted to explain, i realised with problem could still not be fixed and i said let me text it first to we can talk , as i was walking to the car to test he says why do i walk away from him i then said m going to test the car, i drove around the sound is still there, he then did not want to talk to me saying i walk out on him, i told him the sound is still there as he was about to explain i took out my phone coz i wanted to record was he was saying booom.... he walked away

am now stucked with the car not fixed yet i paid them, i regret the day i decided to took my car to them for service, their service is very poor and i wouldnt recomment anyone to them, they have proven that they cant fix the matter yet they are the ones who created the mess, i want my refund so i can take the car somewhere else for it to me fixed