Silence after complaints on products sold to me which Expired I months ago!!!

It's very saddening and ANNOYING at the same time to see this Retail group messing it's own reputation and robbing clients in broad day light. I lodged a complaint on the 9th December 2019, where I bought EXPIRED Lipcare products which they had Marked down as sale items.. After using one and experiencing skin irritation, I did PROPER inspection and discovered they had infact expired FEBRUARY 2019.. I reported on Hello Peter and the day after, was sent an sms with a reference number and told the Case was being investigated. Up to the 18th December 2019, there still was NO FEEDBACK so I called them (callbrecords available) to find out progress ...however I was told the case hadn't been attended to yet, I should wait 48 hours and it is being referred to HIGH PRIORITY department... Yesterday 28th December, still having not received any feedback, I called in, quoted ref number..was made to hold over 10mins (Call records available) I was told "the Management hasn't had time to respond to my case as it is Peak season". When I asked what Peak season meant, Chantelle said it's when high number of complaints are received and Management usually take longer to respond. I gave her my contacts and specifically asked her to handle and provide follow up asap since i had wasted enough time, airtime and data reporting this. PS I was told to keep the Expired products I had initially complained about and the till slip while this "Investigation" (If any) is in progress... Why should this Lousy retail group mess with clients in such a manner?? They are in the wrong selling EXPIRED products which are a health hazard and then give me a runaround when I notify them.