Bad client service

Oops , I went to I store in eastgate mall to check what was wrong with my phone, I was truly shocked by the level of service I received, no one cares about customers , I just wanted them to check why my phone was not ringing when I make calls only rings when is on loud speaker, I got a shock of my life when I was told rudely that I can leave if i want but the process will take up to 7 days. My issue is why 7 days , can those people repairing our phones stay even 4 days without thier phones. Please can someone willing to assist me tell me what is the procedure