Revoke court order before sealed

Hi all, I need some urgent assistance
I had my final hearing on tuesday where, after listening to both parties (as there was not much in the pot)(as presented by my ex) judge gave the order that I keep the matrimony and take over the mortgage and pay cgt( which my ex said it too much and he cannot afford) she also said that she is not a tax expert and I should consult an accountant to get better idea and gave me 2 weeks time. When I spoke with few accountants and solicitors they all said there is no cgt in transfer between spouses. And also they found out that my ex had provided the cgt numbers of other properties very exaggerated, which is also incorrect the way he has calculated it. So I want to go back to the court and request them to reconsider their decision as it is not finalised and sealed yet. I want to know how to approach the court regarding this. Thanks in advance