No courier?!

Receive the wrong size of towels that I ordered. They took 3 days to get back to me, only to tell me their courier is only available to fetch it after 13 September. And then refund or replacement will take 7 - 14 days. I appreciate that mistakes are made, but no courier? This means that I am without the product for over a month and without the money I spend, so I can not replace it. Surely if you sell online you need to have a dedicated courier company?