Bathroom sink and floating cabinet (New Greens AL3)

Brand new sink and cabinet.
800mm for the cabinet and 812mm for the sink.
It doesn’t fit in my new bathroom as you can see from the pictures so have had to order a 600mm one.
Have only had it 1 week and company won’t accept return as it’s my error.
Sink DOES NOT come with back plug or black tap, these have just been put there by my plumber before he realised it doesn’t fit.
Have put the website images and dimensions on so it’s clearer to see the item as it doesn’t fit where it currently is.

Collection only