Skynet deliver incorrect items.

I purchased an item from Superbalist last weekend. I received a notification saying that Skynet would deliver the goods by Wednesday, 5:00pm - nothing arrived. I was then assured by Superbalist that Skynet would deliver my goods by Thursday, 4:00pm - nothing arrived. By Friday I was tired of waiting and happened to be out when Skynet finally arrived. After being let in they literally dumped a parcel on my patio and left. Turns out I received a parcel destined for someone living in JHB - I live in DBN. After phoning the recipient who the parcel on my patio was supposed to go to, we discovered that she had received my Superbalist order! I contacted Skynet who informed me that this was Superbalist’s issue and I was to take it up with them. I struggle to understand how Superbalist can be responsible for a parcel destined for JHB getting handed over to someone in DBN. There are two courier stickers on the box I have in my possession now. Both clearly showing two different addresses. Surely this raised a red flag at the depot? The best part, I’ve just received an email saying that my order has been delivered and hope I enjoy it. Superbalist are aware of this and the issue has been escalated. All I hope is that Skynet can accept responsibility here and not just say what they did when I phoned on Friday which is that I must take the matter up with Superbalist.