Extremely disappointed with the manner in which I have been treated by Woolworths

Extremely disappointed with the manner in which I have been treated by Woolworths. I purchased food via Dash and received food expiring on the same day. I complained about this and provided them with proof of the expiring item. They confirmed that a refund will reflect in my account within 3 to 5 working days. Today is day 8 and no refund has been received. I have sent numerous emails requesting for an update and there has been no satisfactory assistance. I made several calls requesting for a supervisor and to date no supervisor has had the decency to return my call. For a company like Woolworths to behave in this manner is shameful and disrespectful to customers who choose to support them! I am absolutely disgusted with this level of treatment.