Lack of communication

I have used The Cleaning Ladies for around four months - they provided a lady to clean my home once a week at a rate of R350 per day. Despite a number of communication problems and incidents (including leaving my home unlocked on numerous occasions) I continued to use them through the holidays whilst I was away. Last week due to another misunderstanding of the clear email I sent which could have been sorted out with one phone call, I was left without a cleaner and no chance of having the same cleaner on my requested day in the future. Alta does not even bother to call to apologise or make any effort to sort the problem out so I cancelled the service and asked for a refund of my advance payment- no response at all!