PAID NO DELIVERY!

I placed an order with Superbalist and upon receiving delivery the pants were too small. I lodged a return and refund as at the time there we no longer bigger sizes available. I subsequently went online the following day and there were sizes, I emailed and called requesting for the change from a refund to an exchange which was processed by Lerato K a Superbalist client concierage and delivery was to happen August 1st. July 31st a driver came to collect the package but did not have the substitute package, August 1st another driver arrived to deliver but wanted the initial package which I advised had been collected the day before. He returned with the package back to the warehouse I emailed and called and explained to Namhla another concierge person however to date they are still claiming to make contact with their own warehouse and cannot locate the parcel.