Pathetic Customer Service and Inaccurate/Missing Service Records

I have always serviced my vehicles at a Toyota dealership however when trying to book my vehicle at a McCarthy dealership I am advised they have no record of the previous service which was done at Gateway Toyota. How are we supposed to maintain service history on our vehicles if Toyota cannot keep simple records in order? I am also being quoted for replacement of spark plugs when, according to the owner's manual, this is only required every 90,000 kms. So it seems Toyota either do not know their own vehicles, or are changing service requirements as when they feel like it for no apparent reason.