Well you should not put her over your knee and make her ass red. That is called topping from the bottom.
Your sub you know what she hates but do use that as a punishment.
Or utter those words that cut through any sub

Punishments should be just that punishment for doing something wrong. However the punishment should not be something that you would enjoy. If you enjoy pain the anything pain inducing should be avoided. The words disappointed in a certain sentence could suffice

Should really discuss this with your dom as you coming here moaning by advising that you demand this that and next thing is very poor form.

Sadly you have to bite the bullet and move on to someone who would appreciate you not the gold digger that you were involved in.
It is not investment it is throwing your money away and since you cannot fund her lazy ass she giving you the cold shoulder. Face facts and move on

Looking at this and seeing mixed messages. First the break up in January but both seeing the other as their Dom/sub partner.
If you both have expectations to move on then do so then you are hoping that thibgs can be patched up and start back up again.
Make up your mind.
You either want to rekindle Read more… the relationship or separate. However you need her thoughts on this and stop this in limbo state and take the necessary steps of reconiling or ending all non friendzone relationship