Worse service from a so called reputable company

Hi, I am disgusted with the work that was done by Greg from Durban North fencing CC. He had issued me with a quote for labor and the materials which included the barb wire as well as angle brackets used to provide support for the *****s that held the barb wire In place. I then processed an eft into his account before he came out for the installation as this was a request made by himself. I then obliged. Upon inspection of the work done, my mom who was present at the time, noticed that he didn't use the angle brackets which he had quoted me but used *****s to hold the barb wire in place. Now any sensible person would notice that *****s wouldn't be able to hold such a heavy metal but a bracket would. He claims to have 20 years of experience in the field, surely he would know this. I then requested a refund and he has yet to respond. I have sent many emails as well as a number of calls to his office as well as his cell phone but he keeps canceling the call. Is this how business is done by a person who claims to have all this experience. Is money so important to Greg that he forgets about customer satisfaction let alone having any people's s****s. My experience with Greg has been a total disappointment as I received his details from the internet and expected the Owner himself to be more polite and not so arrogant. When calling him the first time requesting the quote, Greg was very friendly and produced the quote in a short space of time but as the job was completed and me requesting a refund, his attitude totally changed. I would just like to say that this is a disappointment to the people who contribute to the lively hood of his business and to get service like this, is appalling.