KIA Randburg waited an entire month to tell me about an additional quote! i was only informed a day before i needed to collect my car that there was another issue they want me to pay for!!! terrible service

KIA Randburg has been completely unprofessional and terrible! I took my car in to KIA noticing that I had an oil leak which affected my brakes. I spoke to the service consultant who booked my car in for an inspection and they provided a quote which i acknowledged to pay for and paid a deposit (half the amount) to start the repair. Furthermore I also informed my insurance who brought in an assessor who also picked up the same issues and provided me with a report. I was told because the Kia rio is discontinued the repair would take about a month as they have to order the parts internationally, i understood that and waited. On the 12th of July 20224, the service consultant Nkosi called me to inform me the parts would be received on the 15th of July and the car would be ready by friday and i opted to collect on saturday, the day after. On the 19th of July 2024 i called the service department to speak to the consultant, who at the time of my call was not there, she then called me back to say that i could not collect my car because there was additional issues that the technicians picked up and that i needed to pay for that repair as well before taking my car back. They waited almost an entire month and the day before collection they have additional quotes amounting to R31k they want me to pay. This is completely terrible because i waited an entire month, no calls, no emails about this additional issue they now want me to pay for. HOW IS THIS FAIR???? when i asked why they didnt inform me when they were still diagnosing or doing inspections they give me no answer. I now have no car because of their terrible service and their evident ploy to get more money out of me, why was i not informed until i had to initiate communication. I need assistance on where to report KIA randburg for this service, they cannot hold my car against my will. if they truly were efficient they would have told me on the 12th when i spoke to the consultant, even way before that. I am truly disgusted!