In case any Zoe users are interested I just found out that whist I can’t disable this sound on the latest Zoe, pressing the associated dash button by the drivers right knee (previously the disable button) let’s you cycle through alternative sounds (3 I think). I found a much better less annoying sound. You can only hear the alternatives and select whilst actually generating the sound under 20 miles an hour.
It’s a right pain for sure. I had the same issue. The Zoe was going to be returned if the migraine inducing sound wasn’t defeated/changed. It was driving the other drivers nuts as well as me and I wasn’t doing less than 20 very often