Woolworths Rosebank Mall Poor Customer Service

I lodged a complaint on Tuesday this week regarding one of their products that I had bought on Monday at their Rosebank Mall store via Twitter DM. I sent a picture of the product which were spoilt mandarins and they then asked for further information of the product and my contact details. I sent everything to them and they said they will get back to me. After no response, I sent an email to their customer services department and I still haven't gotten a response. I am not sure what I am meant to do at this point and I am considering not purchasing from them ever again