Disgusting Facebook customer support service

I had the worst customer experience with one of your support agents on your Facebook messenger (Pierre Cardin SA). I placed an order beginning of December and immediately received an email to say I'll hear back within 48hrs with more tracking info etc. It had been over a week and I had not received an email back regarding an order I already paid for.. So I tried phoning in and no one answered (I did eventually realise that they only reopen on the 4th Jan - today). I then messaged the fb page just to see the usual delivery times as this was my 1st time ordering and the website said 1 day delivery time to cape Town.. The agent told me they were closed which I understood, so I asked if I should ignore the first email received saying I'd hear back within 2 days. The agent then responds back in the rudest way with exclamation marks saying "they are closed, what do you expect!!". I told the agent that this info is not clearly shown on the website which is why I'm confused and simply enquiring the process also being my first time ordering! I told the agent I was going to complain about their attitude and they then blocked me from the entire Pierre Cardin fb page so I cannot message anyone to complain and I also cannot leave a negative review. The agent I spoke to was at 4.35pm on the 28th December. Absolutely disgusting service just over me enquiring about the delivery process of a product I've paid for almost a month ago now.