CHEATED OUT OF MY MONIES WORTH_WORTH

I just bought a 125G bag of Simba Lays (spring onion) , when I chose the bag it looked full of chips however I was highly disappointed when opening the bag as 3/4 of the bag was filled with air. If Simba is cutting down on quantity it would be great if they reduced the size of the bag as this is unacceptable and misleading. I have just lost all faith in Simba and they also just lost a long standing customer. IRRATATED