Myself and a few other coworkers were let go for "breach of code of conduct " for stuff said in a private whatsapp group chat.

Thank you for your question. Given what you have provided you have been wrongfully dismissed and you are owed severance. I would encourage you and your co-workers to visit the severance pay calculator our firm has developed to see what you are owed (www.SeverancePayCalculator.com). I would also encourage you and your co-workers to call us and set up a consultation with one of our employment lawyers.