Faulty clutch repair caused oil leak

Had a clutch repair done by The Mobile Mechanic in Johannesburg. The name of the guy in charge is Lyle. The website is: https://themobilemechanic.co.za/

My clutch was repaired but the car started to leak oil soon after the repair. I contacted the mobile mechanic again so that I could get the oil leak checked. After they did not come to check the leak I had to take the car to another mechanic who confirmed that the leak was a result of the clutch repair. I let the mobile mechanic know of his faulty clutch repair, sent him the invoice to pay for the repair, which he obviously refused to do.