Pathetic service from Makro customer call centre!!!!

I purchased a commercial Fridge Star fridge on 29 May 2019 via the online website for my mum's take-away. After receiving the item and utilizing it, I noticed that the fridge was not getting cold. I adjusted the settings but it still wasn't cold and the food started going off! Both my mum and I have contacted the call centre for 2 weeks but our calls keep cutting! I eventually managed to get through and speak to someone on Tuesday 11/06/19. I sent the requested information to her via email at 7am yesterday. Up to now she hasn't responded. I called the call centre 6 times for today and the calls kept cutting. It is very strange that the calls cut after someone answers and you try to get help!!! There are no reference numbers for any of the calls as each call is only about a minute or 2 long! The e-mail was sent to ********** They are quick to take your money, but then there is absolutely no service whatsoever! I went into the Silver Lakes branch to get help but was told that since I did an online purchase, they cannot assist me! This is just ridiculous! My mum is losing so much of money as everything she cooks goes off!