Wefix Cavendish removed my protective phone cover, and gave my phone back without it, would not courier to me.

The Wefix technician removed my protective phone cover and did not put it back on again. I only realised when I got home. It is hugely difficult and inconvenient for me to return to the store. I asked for it to be couriered to me, but they said that they would only do it at my own cost, even though it was Wefix that removed my property and didn't return it.