1 Month later, no repair of Fridge warranty claim

We bought an expensive Samsung fridge/freezer from Hi-Fi Corp. We lodged the report and warranty repair claim on 16 January 2015. We constantly followed up with the service desk to when the repair will be made. We were constantly lead to believe the lady we were talking to was the store manager, until we got fed-up with all the excuses and walked into the store on Saturday the 7th of February to demand the service we paid for. Hi-Fi Corp also had nice banners pasted all over with a promise to repair in 21 days. We asked for the store manager, Lucy. We she realised who we were, the real store manager Lizbe was introduced to us whereby 1) I raised a concern that an employee impersonated her designation, and 2) what is being done about our repair as I find this totaly unaceptable that there has been no resolution to fixing our fridge. We were promised first thing monday morning. Today, Wed 11 Feb 2015 we followed up for the 3rd time this week again getting a response that Mastercare (their contracted service provider) is waiting for the gas from JHB to arrive to re-gas the fridge. This is really pathetic service, lies and deceipt to go with it from a large retailer such as Hi-Fi Corp.