Pathetic service from Nedbank Insurance

I got the double puncture on the 30th January in the evening, I then called for roadside assistance since I only have one spare wheel, I was told they are coming to take the car to their storage because they consider double puncture as an accident they then evaluate the vehicle and decides if they fixing the car. On Saturday the 31st they contacted me they arranged a courtesy car. They requested the tracker report which I gave them, the car was driving at 30km p.h due to bad rain, so to my understanding the impact can't be very bad. Lerato Mthembu called me to tell me assessor its done assessing, if which they will be final assessment on Friday the 6th.They told me now they are moving the car to renew it which they will give me updates, Renew it had the car from the 6th ,but their final assessment was only done on the 17th.I called Lerato and I told her I am not happy with the process and delays ,because they gonna end up costing me.Until the 23rd I was told they are still waiting for the parts. I called Nedbank Insurance to speak to Lerato, but unfortunately I couldn't speak to her but one of her colleagues which they transferred me to Renew it ,were I was told parts takes up to 10days, when I finished I called Nedbank to ask what is going to happen with Courtesy car since is going to be due soon , they promised to contact Renew it and get back to me, no one phoned me, I called again they said they escalated the matter to supervisor which Lerato will get back to me , she never did.Today I was supposed to take back the car then I called them again to find out since they promised to call me ,no one did and between Nedbank and Renew it no one seems to take responsibility in terms of who delayed in the process. Today I called them again they then extend with one day, they promised to call before end of the day, I called them around 16h00 they said they can't get hold of Renew it to discuss way forward they will call before 17h00, its now almost 18h00 no call and I have explained to the lady how it frustrate not knowing how to plan your day because I don't know what is gonna be the feedback. I also believe they somehow delaying and overcharging fixing unnecessary things just to make money from insurance which in a long run it end up costing the customers.

May you kindly assist