I loan my ex wife money now she not repaying been over a year what can I do?

what are the reasons you are giving her money? are you legally obligated to give her the money? if you're not legally obligated I would personally just stop giving your ex, money, she is no longer your wife and as long as you have no legal obligation you do not need to continue loaning her money.

If it is not a large amount of cash, I would simply let it go and not pursue it, and stop giving her loans. If she does owe you a lot of money especially if she said she'd pay you back and hasn't, I recommend finding a lawyer.