"Wins, what wins?"

Hi there, I have been experiencing the same where as you top up, top up then maybe win R100, then top up ,top up, then win.less than half so ja...I could understand once or twice but over four times mmmm...the amount spent is thriple than what you would win? The customer service in my opinion was great when I had a problem, gave me the right advice and info but as for wins well... I had better wins off other online casino...rather disappointed