No Feedback or Response after writing report

I wrote a complaint regarding Fruit and Veg City last week Thursday, 21 May 2015 for bad service at till point. Today is 26 May 2015, and fruit and Veg City has not yet contacted me regarding this complaint. I need to know if this is their way of making me to forget this incident. I would like this matter to be escalated please,since this could happen to another innocent customer at their Fruit and veg City , Newton Park branch in Port Elizabeth.