Exhausted by ex’s greed

For many years I’ve payed maintenance through the CSA (private agreement prior) to the mother of my children.

Despite the CSA being fully appraised and has accepted income details and refresh of information recently my ex partner is not happy with the outcome.

I have it from a reliable source that she has gone to see a solicitor to seek further advice. I find this staggering considering the efforts she’s applying.

Has anyone been in this situation before and if so can someone please clarify what options are available?

In summary I’m exhausted by the constant challenge and shear greed of mother. Oh I’ve also caught her taking photos of my car.

Any similar experiences and / or outcome appreciated.

Thanks