Angry customer

I have laid a complaint with Pick n Pay regarding a product that I have purchased from them. Their product was a possible food poisoning, spoilt, horrible stink and off in colour. To date I have not received any positive feedback, a solution or a way forward to to my complaint. I have had a lady by the name of Elisha who called me on the 28th ty May. She did advise she will get back to me regarding what I proposed to her because I didn't agree with what she told me. To date I'm still awaiting her further call. She did advise me to allow her the opportunity to try and help resolve this before I go any further. I then receive 4 emails from a lady called Zinhle Mrenqwa whom is continuously sending me emails to fill a form out so she can further escalate the complaint. I'm rather confused as I thought my complaint reached the correct channels. She sends me an email with no attachment. She then tried calling me on the voting day imagine and her network was terrible. How can they call me on a VOTING DAY? Today I received an email from Babalwa Lombo sending me the similar text like Zintle. What is happening with Pick n Pay. Firstly they deliver products that are off and possible food poisoning and they delay on such complaints. So basically they don't take customer concerns seriously and the numerous people communicating on my complaint is absolutely horrific. If I get no joy I will take this further to the health dept.