Gumiso electrical and Air conditioning worse company with no code of ethics

Worse company with no customer code of ethics. I had a new air-con installed by their team and paid themnin full but after 2 weeks the air-con stopped cooling and I've reported it to both the installer and owner of the business but after 12 days they didn't make any effort to resolve the issue. The owner called me after I gave them a bad review on their fb page and promised to get it resolved and would have given me feedback but then blocked me on WhatsApp and didn't answer my calls or emails. As soon as they have their money they won't be available for any come backs which is totally unacceptable.