Sorry to say, but you bought a harrier warranty (3 yrs up to 175,000kms) which isn't worth the paper it's written on. I have been involved in the car yards for over 5 years now and have sold many of those exact warrantys. You have to get the car serviced thru any AHG dealer. They will find any reason not to pay out on any claim, do not modify your car at all...seriously they are super pedantic and the will try to "sell" you extra's exery service ie: coolant flush, wipers, air cond sys check...just a licence for them to print money.
My advice, write off the money you spent on the warranty and take your car to a workshop you know and trust.

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cheating used to get it faster