No delivery for online purchases

I've placed an order on the MrPrice Home website, and selected the economy delivery option. In accordance with this option, the delivery should take 3-5 days. It's been 11 days, and I still haven't received my purchases. I've contacted the customer support number numerous times. At first they told me that the package was already sent for delivery, but there was no one to collect it, which is absolute nonsense, as I've been home the entire time. They furthermore promised that it would be delivered that same day. No delivery was made up to now. So I contacted them again, this time requesting the parcel tracking number, in order to contact the courier directly. <br> When I contacted the courier company, they told me that the tracking number I've received does not exist on their system, and that it had too many digits. MrPrice Home still insists that this is the correct tracking number. In the mean time, I still don't have my goods, and absolutely no means on following up on it. I've made numerous online purchases before, and this is the first time it has been such a hassle.