HI Abhishek,
I feel the vehicle should be returned at the same amount as you are cancelling the vendor payment also, now if possible cancel the reversal document and get back the vehicle into inventory, do the price adjustment and return. Or if you do not want to post to price diff account do dummy GR for same valuation type to get the MVP correct and then reverse both...
I really cannot answer perfect solution as I do not know where 22K went ?