Disgusting service from Samsung Customer Care Store

My phone has been with Samsung Customer Care since November 2017 for a cracked screen which was still under warranty. I was told that the phone would be done with 3-4 weeks. I called them a couple of weeks later and they had no record of my phone even being booked in and was told that the phone was lost. After a couple of days i called again and they told me it would be ready by Christmas. I came in to the store again and then they told me that the phone will be ready before New Year, this too did not happen. I came into the store on the 2nd Jan 2018 and the part's manager (coloured gentleman with shaven head) told the receptionist to take down my details as the phone would be delivered to my house the next day seeing as i have waited long enough. I waited and waited and went into the store again 2 weeks ago only to be told that the phone is still not ready and that i will receive it by Friday 8th March 2018. I went in on the 9th March only to be told it would be done by the following Friday. It is now the 22 March 2018 and I'm still without a phone. I cant get through to the number listed for them. I am beyond frustrated and annoyed. I will be visiting the Samsung store soon and i will be recording my entire experience.