2007 rodeo nothing but problems!

ok not an actual 4wd issue (my triton is running fine ;))

The wife (unsupervised) bought herself a 2007 3.6ltr V6 Holden Rodeo about 3 weeks ago from a dealership in Sydney, 6 days after purchasing the Rodeo it blew a transmission cooler line and lost all power on the highway (appears someone had patched the line with a 3 inch piece of hose which blew out)

After getting it towed to Holden we were quoted $600 to fix it...all good we thought, the extra $2,000 she spent on the warranty will come in handy.....nope not covered we find out

Holden rings up and says there is also an engine knock which is more than likely the timing chain and we're looking at $3,000-$4,000 to fix that.......surely this is covered under the warranty......nope knocked back again

We ring the dealer and he says to drive back to him (400km away) and his mechanic will pull it apart and see what can be fixed under warranty, so the wife takes time off work (unpaid) drives down and drops it off and catches the train & bus home

before she left I checked the water and oil, the oil cap was covered in a thick white sludge....im thinking possible cracked head?

Warranty people ring up today and say the dealership mechanic has fixed the timing chain and this is not covered, this cost $2500 and we have to pay the dealership $700 towards repairs (he never once mentioned that there would be any cost and never rung at any stage to inform us)

while on the phone with the warranty people the wife asks well what about the water in the engine oil? that could be a cracked head....their reply was that the mechanic had looked at it and there was no cracked head the water had got in there from a thermostat leak (WTF??)