Removal of goods without consent

Received quotation for custom sized blinds for the amount of R12940 in March 2015. Was told that I need to pay a 50% deposit. Deposit was never paid and decided to buy curtains instead as it was only a quote and did not accept the quote. One day they just rocked up with all the blinds and so I needed to pay. R8400 was paid on the 2 June 2015 and R4540 was still outstanding. We made the final payment 24 July 2015. When arriving at home I was informed by my son and nanny that they came into my house and removed some of the blinds, telling my son that I know about them coming to fetch the blinds. I had no knowledge of this. No phone call, no email. They came into my house without my knowledge and removed blinds that was fully paid for. I have laid a case of theft against them.