Woocommerce sumo reward point customize

Woocommerce sumo reward point customize Referral system currently if i setup referral reward point as fixed 5000 points when referred customer purchase first order. but 5000 isn't set as per order, it is set as 5000 times (x) item qty. so when customer buys 3 items referral person got 15000 points instead of 5000. need to fix to fixed points per order.