Poor repair time

i had booked my vehicle in for a 90 000km service (vehicle was running fine), after the service i notice a strange noise from the engine so i returned it the next day. my car was only returned the next week to which i was told the incorrect oil was used. i then took it back in and they told me that they will inspect. i was then next week notified that the engine was going to be replaced. to date i have not received my car.<br> this issue has been ongoing since the 15 Jan 2015.<br> i have been forced to make alternate transport arrangements at my own cost.<br> the poor response from Hyundai Centurion and the lack of assistance is appalling. <br>