Fencing

[spwftm]

We have moved into a new build and the drawings showed a 6 foot fence all around garden.
What is actually been installed to one side of the garden is a 6 foot fence on top of a 3 foot wall as the garden to the right is higher.

Is there a way to challenge this or is it pointless given its retaining next door's garden?

[New Home Expert]

You are living my dream! A total height of 9 feet (on your side) boundary.

This is a selling feature. Obviously the house the other side is higher than yours and their garden  level.
If the fence was lower they could look over the top.

Think yourself lucky and accept it.