Wrong product delivered and won't collect it for my refund.

I wanted to return the wrong jeans I received from Exact! Bash, and and the collection was scheduled for my last off day Monday the 12th Jan. Nobody pitched. I emailed and got an apology and was told that they'll follow up why why the courier never came. Next morning I received an sms saying that it couldn't be delivered but there were people at home. Still waiting with no feedback and the wrong jeans. Quick to accept orders but to rectify is a nightmare.