Renault Australia review: Lack of response to my calls 1

I have had numerous problems with a 2011 renault traffic [purchased new] from numerous gear box failure's which were fixed under warranty, at i believe around 70, 000 klm i had a engine fail which had to completely replaced once again under warranty, the new engine and van has been serviced by renault australia [waverley renault] after having a alternator fail which i had done else where [it took 6 hours from renault to return my call] the reason for the damage alternator was oil in the intercooler leaking out and destroying the above. I rang renault australia concerned as this motor had done less than 40, 000 klm, [i could be more precise but after numerous attempts to get the full history of my vehicle and promised it has fallen on deaf ears] i then booked my van in at waverley renault as it was due for service and was promised by customer service at renault australia they would look at it i packed the destroyed alternator in a box and left it on the passenger floor so they could see how much oil was in it. All i got back was quotes to fix the problem with no guarantee's, i then received e mail's from renault australia that it was normal practice for this to this in which i replied then why was i given a quote to fix it? They then said a hose had a crack in it that caused the oil problem, i seemed surprised seeing that they had done the all servicing on this motor. Not trusting them i paid a qualified mechanic to remove and smoke test the above hose, surprise no crack no hole perfect, the mechanic in question from the first inspection believes it is blow back and is serious problem, and receiving the quote from waverley renault i believe they are suggesting the same thing. When the mechanic remove the hose it had a extreme amount of oil in it, this is suppose to be clean air, i rang renault australia and spoke to a vicki ryall and complained about the ridiculous messages i had been receiving about my problem, she assured me that she would help me and look into it, i then gave her all copy's and photo's and hand delivered them to her, once again she assured me that she would provide me with my vehicle's history, i didn't hear any thing so i emailed hear on the 18/01/17 got a reply on the 19/01/17 telling me how busy they were, that is the last i have heard from them it is now the 15/02/17 i have contacted consumer affairs and the have listened to my problem and told me to get all the information which i have tried . I would like to resolve this problem amicably, this vehicle has spent months in there work shop's with the above problems, and i believe unless proven wrong i have serious problem's, i'am a self employed plumber and i can not afford any more down time with this van, all information can be obtained from vicki ryal renault australia or i can forward to you if they don't return your calls please help . Many thanks wayne