Appliance Repair ****mers

They came to install fridge door seals but bought the wrong size, then had a story about they paid for them already so I had to pay them and then they will bring back the correct ones in a day or so, this has been 3 months ago. When I asked for my money back they said no because I signed the invoice already. I got the rubbers myself at Hisense for R275 (They charged R2000 each). And I needed 3 rubbers.