Vodacom device warranty - worst experience ever, no help or assistance, not putting clients first.

Good day

I bought a Mecer laptop from Vodacom in Centurion Mall in December 2018. In January 2019 the screen began giving problems, the device is under warranty and I contacted platinum warranty. I picked up my device and fixed it under warranty, however they damaged the cover. They have pictures and I have pictures stating that their at fault. They picked up the device again and it is now 2 weeks later and they don't correspond to me. Their phones keeps on ringing and they do not return me emails.

After a struggle, they keep telling me they are busy and waiting for an ETA date. This is a brand new device I had it less than 3 weeks. I feel they are not assisting me as a client. I want my device back in the condition they received it or a new device. I am paying for a device that I am not using. You assistance in this matter is greatly appreciated