Terrible Service from Samsung Smartcare

I dropped off a phone for a warranty replacement on 11/03/2016 and as of today it still has not being replaced. The staff their do not respond to emails timeously. I have phoned several times over the last 2 weeks and the phone just rings, no one answers. I eventually went there last week Friday to find out what is happening and was told the parts would arrive on Monday 4/4/2016. Today is Wednesday and the parts only arrived today and will be installed tomorrow only. The screen is being replaced under warranty, this should not take so long.