Renault umhlanga

Payed 1200 for diagnosis for an overheating problem renault say it's the thermostat and expansion bottle cracked so we buy the parts and we've had no car a week now because renault is "busy" anyway today they say it's not the thermostat just the expansion bottle giving problems so we tell them to pls take the car for a long test drive 15 mins or so ...they said they took the car all the way to sibaya and they said it's ready for pick up so my partner goes to collect the car and not even 2 blocks away the car starts overheating the same issue we asked them to fix ...they a bunch of useless people who inconvenience there customers ....it's now 5 pm and my partner needs to take 5 taxis to get home and zero ****s given by the staff from renault ....I'm selling my car and you won't get a cent of my money again and anybody looking into getting a renault do yourself a favor and save yourself from a headache buy any ****en car but a renault Many thanks