the actually problem is the bearing going in the cvt box

so its actually all labour in this case

but its a common problem

servicing the box more regular will help fix the problem you have
but i guess its too late for you
the service book is not always a indication of when to do things its a guide
it says if you drive more and depending on your driving conditions servicing should be done more

your lucky that they are even helping you out imo
3k is the going rate at honda
to fix this