Wish complaint: Incorrect Goods delivered, Refused to Refund

On 19th June I ordered 3 dresses from Wish. 2 were delivered. One of the dresses delivered is the incorrect colour. The first dress, incidently, was the incorrect fabric. This dress they refunded pretty ly.
Both dresses were delivered together on 16th July, but in separate packages. On numerous posts on their online support page (too many to list) they still refuse to refund. I find it difficult to talk to a computer and the option isnt there for the correct reply. They say that the tracking number doesnt match their records. I sent 3 photos, 1 of the incorrect dress, 1 of the 2 labels on one package, and 1 of the 2 labels on the second package, neither of which match their records. It isnt my fault that the supplier supplied them with the incorrect information.
I sent an email and was informed that I have to deal through the support page I have been going around in circles trying to get round their complaint system.
There will be a further complaint when the 3rd dress delivery date arrives, 12th September. The notification tells me that this dress has been delivered, but the town delivered to is not where I live! and the computer tells me they can do nothing until the delivery date has passed. That will be fun!
The fact that the order clearly states a white dress ordered and the photo clearly shows a yellow dress received appears to me to be indisputable.
It is not the cost of these items that bothers me, quite small, but it is the principle of a large company refusing to deal with their reponsibilities.