Beware of this aircon installer - DC electrical

DC electrical installed 3x samsung aircons in Feb 2015 for which they were paid. A week later 1 of the 3 units stopped cooling. I was told there was a gas leak and the gas needs to be topped up on all 3 , I agreed to have them refilled & paid for that also. 2 weeks later the same unit stopped cooling again. I called the owner Darren who had promised to come and looks at the unit. in the interim a second unit had stopped working. After months of persisting he finally arrived at the end of September to look at the units and advised the compressor was faulty. he then made arrangements to remove the 18000 btu on the 3 October, this included collecting the remote & user manuals. I was then told samsung have changed the compressor and he has the unit with him and he will install it shortly. After not hearing from him i began following up and was beginning to get the run around, the today-tomorrow story. He has since stopped taking my calls and responding to SMS's or whattsapp messages. i will be pursuing legal action against him. Please think twice before using this service provider and always have a written contract with any supplier who is not an established brand.