Dishonest business

My mechanic bought a gearbox from Toni Auto in Brakpan. It was the ring gear box. I paid R6000, 17/5/2025, he returned it on 20/5/2025. They have promised to return the money but have not. Phone ***/ +***1, Address No 3 Goods Road Brakpan, they cut my calls , I have proof of payment and message