Thanks for the response Foggy.
My current payment compared with my initial payment in 2016 is £180 more and that's never been a problem., because expenditure has been fairy consistent.
But with my expenditure increasing for next year I can't see how they've come to a reduced payment of £65 less.
Isn't the calculation always going to be the same on every yearly review on how to get to what I can afford? Income - expenditure + partners share of bills.
I've worked out how they got to my current monthly payment, so swapping out budget amounts should give the new monthly, yet it's way off.
Feel like if I question it then, as per what you said, it'll default my iva, which I don't want, but on the other hand I don't get how the they can seemingly pluck a random payment amount and no questions can be asked