Pnp online is a *****

I received my online order today, but once again some of the stuff did not arrive with the order, even though it was marked off to be there????This is the 3rd time I have tried out pnp online, the other 2 times the bleach ran over the milk. We never received refunds after sending it back with the driver and phoning to complain. I really thought third time lucky, but oh boy was I wrong. So some of the stuff was marked on the invoice , not supp****, but the money was taken from my account for it. Some was marked sup**** but we never received. About 2 hours later the driver pitched again with the stuff that was marked as supp**** , and said that they forgot to load that bag for him. So that sorts out the supp****. Still no refund for the stuff that was not supp**** To my surprise when I checked my credit card today pnp debited my credit card twice. Once for the right invoice amount of R1734.54 and a second time for R2028.17. How is this possible? I have not even heard back from the customer care departement that I emailed 2 days ago.