Bad communication

My Fridge needed gas. I called Master care to send someone to re-gas. Serodge told me that she will take the fridge back to their premises to have it re-gassed. I asked her if that will cost me extra and she said no.<br> 2 days later I called her for the quote, but she said her technician is not is she will call me back. A day later she called me and said the gas will cost me R510 and the thermostat will cost me R350.00. I told her I only want the gas done, she then said they need to change the Thermostat otherwise there will be no guarantee. I insisted that I only need to have the gas done. Yet, 3 hours later she called me and said that the compressor needs to be changed! I don't think they know what they do there! I felt that they want to do me in and told her I will send for the Fridge and have someone else look at it. I send my driver there to collect but they refused to give it to him and demand that I pay the R350.00 for a call out. Now this wasn't mentioned to me at all. The fridge is still with them!! Please assist.<br> <br>