Price overcharged Woolworths online

I bought 2 packs of school trousers online on the 02/01/24 and the online price for each pair of trouser was R349, and to my surprise when they were delivered on the 05/01/24 the price tags on both 2 packs was R319 for each pair, I then felt that I was ****** as the price I paid online was more than the price on the tags sent to me as their price was less, I then emailed Woolworths customer care and they only responded 3 days later and the guy who called me Lorenzo said that there is nothing they can do as it is the warehouse fault for not removing the price tags and he ended the call whilst I was busy explaining to him that I need my money back for the differences for over charging me as it is also not my fault.