Bad experience

I'm writing to express my extreme dissatisfaction with Limax Security's services. In 2020, I paid R14,000 for burglar guard installation after a quotation was done .When they came to install them they found my window offset insufficient, making installation impossible without compromising window functionality. They told me that the person who came to take measurements was unfair not to tell me that my window offset were insufficient .They decided not to install and promised to report the issue. Later, I was asked to add R6,000 for beams which I couldn't afford. I then requested a refund as i felt that it unfair for me as the quotation was inaccurate. It's been 5 years, and the issue remains unresolved. Recently i phoned Dion and begged to receive a refund he offered a R10,000 he said R4000 is cover the rework of the burglar guards I have given Limax security enough time to resolve the issue. Dion's been rude and unprofessional, He told me that it wasn't his fault that my window offset was insufficient, He even threatening to involve lawyers .I have sent messages directly to Dion he is not responding to my messages and not taking my calls. I feel not taken seriously may be due to my gender and race