Please house,I am having issues with the power assisted steering fluid of my EOD 2005.i noticed shortage in the fluid cup and subsequently took the ride to a repair shop(mechanic)the guy said it was the cup that was the culprit that i should change it at the cost of 4k5 since he could not notice any leakage from the steering.I have done that and the problem is still same.I am tired of filling hydraulic oil every morning.What could be the cause please.

Thanks