catering services slush repairs 6a kaap street boksburg very dishonest

had my slush machine in for a major repair in november 2024.then again in march 2024.everytime i take the machine in it comes back with new problems.the owner emanual is very unprofessional and rude.he always tells lies.he refuses to disclose what work was done.and he does not invoice the full description.and also does not give me my old parts back.he charged me R2400 for regasthe machine does not even take 1.5kg of gas.the whole 9kg gas is R1800.he now refuses to take my calls or return my messages.now he broke my centre barrel.i spend over R15000 and not happy at all.he is more expensive than the agents of the slush machine.how can i recover my loss?be carefull of this company.