BAD Service and Communication

I had put in a claim with Discovery for my Iphone6 as the screen had broken. I was told it would take 2to3 days for me to receive it back. My phone was collected Thur 14 Jan. A week had passed and I still did not have my phone back so called them on Fri 22 Jan. I was told that there was a problem in sourcing the part. I demanded that they give me a completion date and if it was going to take much longer that I will need a phone to use while they are fixing mine. Discovery phoned the supplier while I was on the line, the agent said the screen was arriving the same day and that someone will contact me and give me a full report and assist me with a replacement phone if it was needed. The agent also informed me that they knew there was a shortage on the screen. No one had called me so I decided to call again on Mon 25 Jan. I was then told that they now could not source the screen and would have to replace my phone. I had explained to her that I was leaving the country on Wed and needed the phone back by Tue. She said that there will be someone that will call me to let me know what the plans were and how they would assist me. It is now Tue at 14:30 and I have not heard a word from them.