Perfect Upholstery Randburg

Perfect Upholstery came to my house and convinced me that they are fully capable to do Lapa Blinds for my patio. I paid the deposit and was promised the blinds will be deliverd and installed within 3 days of receiving the deposit. 10 days later they pitched with blinds stitched like a child was doing the sewing and a product different as agreed prior to me paying the deposit. Everything was done cheaply. As I got very mad at the unprofessional delivery, they promised to fix the blinds onsite and has yet to come with their machine. They have no idea what they are doing and lie about their skills. I am considering legal action.