HD Appliances ********* customer service

I contacted them and let them know that my fridge has a problem with the mother board, they came to my house and they decided to do something else and charged me R700, I paid, later that evening I contacted them and told them the fridge is still not working, they came back 2 days later and said they are taking their fridge to their workshop, which was not something we agreed upon, I allowed them, 3 days no communication, I texted and asked on the status of my fridge, they said they will update me, another 3 days later I text them to notify them that I hope they are not replacing any parts hoping to send me a invoice because they are not communicating anything with me , than the guy called and said the fridge is fixed it will cost another R1200, I asked them how because initially I did explain the issue with them, and they decided to do what they want, can they bring my fridge back and I will pay month end, I will definitely not run away because you know where my house is, the guy refused and said I will get my fridge after I pay, for me it is ********* because why are you charging me twice if I told you what you need to focus on but didn't do that? You than decide to not to communicate anything to me than double charge me?