Coles Coles Overcharging rip off! Over 5 times higher than the normal amount North ryde nsw

Rip Off Alert! 

Today I was the victim of Coles supermarket online shopping app trying to overcharge me first the app quoted $3000, I was in disbelief I refreshed this and selected click and collect instead of deliver. The app readjusted the amount to $1100

I took a screenshot because. Still not understanding why this amount is so high ,  each week the average about has been  $150 one week was $200. There is no way weekly grocery prices can be $1100 who can afford to spend this amount on food it's more than rent each week is. 

This is for one person , I think this has got to be wrong and investigated. 

It is supposedly iddeagle for these large supermarkets who have a monopoly to be involved in price gouging this has to be investigated and they need to be made accountable to the authorities for doing this.