Too big to care about one pensioner who still doesnt have his car back after 4 months

My father's vehicle was given in on the 25th July 2022 for repairs. Friday will be 4 months that his car has been at the panelbeaters because apparently they dont have parts. My father has incurred costs of R 20 139 for rental vehicles after the 30 days lapsed that Outsurance provided a courtesy vehicle. He has been trying to follow up with Outsurance month after month even offering to collect the parts himself to resolve this but every attempt to get assistance from Outsurance is met with an indifferent response and an attempt to string him along. Yesterday the excuse from Outsurance was that the panelbeater wasnt answering their phone. Today again he has not been called by Outsurance. They couldnt be bothered that he needs to keep paying for a rental while he continues to pay his monthly premium for a service he doesnt get. I have now attempted to resolve on his behalf and the 'account manager' is not available. After insisting on speaking to a manager I was put through to a client liason. Again I am met with a non-commital response and a promise that he will be called. Cannot tell me when though, just that he will be called sometime. So we carry on one week to the next while my pensioner father pays out his own pocket for a car because Outsurance are to big to worry about an old man who doesnt have his car back after 4 months. How you treat a pensioners says a lot about your values as a company.