My ex partner playing delay tactics

Am currently supporting my ex on an interim financial order. I had requested to settle finances in April 2019 which she agreed to do without involving solicitors.

After asking for valuation of the house in Dec 2019 she has now changed tack and is asking to go to courts.

Am I within my rights to tell her I am unable to continue paying the interim financial order (given her numerous chances and notices that I wont be able to sustain it)

Also will the courts consider that all efforts have been made by myself to settle with her (although without solicitors) for almost a year now.

I have now recieved a letter from her solicitor suggesting I dont stop payments as per interim financial order. Am keen to get this resolved once and for all. Not keep paying her 'free' money as I am told this doesnt come into the final settlement. Or will i get consideration for the payments I making towards her for the last 3 years via the interim financial order ?

Any responses please. Would be much appreciated.

If you stop paying or reduce the court-ordered amount then you are in breach of the MPS order. If you facing genuine hardship and can no longer afford the amount in the order, then you will need to apply for a downward variation - but that might take some time to get to court; it may be better to focus on what steps you can take to facilitate constructive discussions about a financial settlement, including finding our what is fair and what you could set out in an offer to the other side. Wikivorce has a low cost financial settlement consultation that would be helpful to you.