Review Unfair charge of a parcel

Postnet at Goldfields Mall in Welkom someone by the name of Nico wanted us to pay R510.00 for a parcel less than 2kg to Polokwane while their fee is R99.00. Does Postnet have this rate? If they do, since when?

I use Postnet that why I know this are not their charges.

Thanks

FM Sephuma