Takelot.com Misplaced my order and not responding to my query.

I ordered Milk Shake powders from takealot, I waited for my delivery on the 3rd of May as I was promised or notified but never received my order (No. ***) but when I tracked it it said delivered and signed for by Sipho but I never received the items, I sent a query for my order, received an email from them saying my query has been sent to the courier department for further assistance; as soon as we have received feedback - we will get back to you. But I haven't heard from them.