Uber double quoted fare price.

Uber quoted my daughter on Saturday R483 for a Van from PTA Botanical Gardens to Centurion. Yet ended up charging her R797. That’s ******ion. And they just say sorry, fares are subject to change and they feel its a fare rate for a 16km trip. With double initial quoted amount? Yet when I ask for a estimate now they also quite me R483. Uber will not see me again if this is how they make their money. This is theft.