False advertising and Terrible service

I ordered a jumpsuit on the 14th of September for a baby shower to be held at the end of that month. It was R300 but I was charged R545 upon checkout. My order was meant to be delivered at my door in 7 - 11 days. 56 days later my order had still not arrived, the baby shower had passed so I cancelled the order and asked for a refund. Instead of them processing the refund, days later I get an email telling me to go collect my order at a post office in Midrand and I have to pay R276 to retrieve it. In essence I will have to be out of pocket by R821 for a jumpsuit sold at R300.