No response to complaint

I have usually had only good experiences with Woolworths and so I thought that I’d get a prompt and effective response to a complaint I made over Facebook messenger. I sent a message on 28 November and Woolworths is unresponsive. The 1% retinol Skoon products sold at the Sandton City branch had the 0.5% Skoon bottles inside. Customers were therefore paying more for the 1% but actually receiving the 0.5%. I asked the manager and staff to remove it from the shelves until the correct bottles were included in the boxes but nothing was done. I then messaged Woolworths to no avail.