Betting types:

Starting Price (SP)
This is the official, final fluctuation supplied by the Australian Pricing Network (APN).

Starting Price Insurance (SP Ins)
This is the highest official fluctuation supplied by the Australian Pricing Network (APN) of fluctuations from the time of the bet being placed to the final fluctuation.

Best Fluctuation (Best Fluc)
This is the highest official fluctuation recognised by the Australian Pricing Network (APN) during the entire betting period.

Tote
This is the final closing Tote price as designated by SuperTab (Victorian Tote).

Fixed Price (FP)
This is the price actually manually offered by the individual bookmaker.

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You can also contact the Race club Bookmakers' Supervisor (appointed by the Racing Industry and under control of the Chief Steward) who can act as an independent arbitrator. In this way the punter's claims are treated confidentially, with respect and sympathy.
Of course, disputed bets are more often than not settled amicably between punter and Bookmaker.