Unhappy customer ????☹️

Hi! I bought a fridge through laybye at Fair Price once I paid all the money which was R4 499 plus R130 for delivery... about a month ago. The fridge was delivered and with in a week the fridge started acting up it could not feeze at all. The I went and informed them. After a few days they sent a technician to check on it, he was about to fill it up with gas which was the reason it was not doing what it was suppose to do. So I refused them to fill it because to my understanding its a brand new fridge. So I went back to the store and requested them to change it to a new one. So far they said they will deliver it yesterday and so far they have not said much. I called them this morning they are only telling me after I made means to call the store that they ran out of stock and that they will get back to me. Thing is currently all the food I bought is spoiled and its frustrating that the are not even making means to inform me on how far long they are in making sure that my case is being taken seriously. Im from Kroonstad in the Free State. I hope Hello Peter can assist me in some way.