Repair of Samsung cell phone

Handed Samsung j1 Mini to repair speaker on 10/01/2018. The phone is still under warranty. Was told the repair would take five days. Still haven't got the phone back, have driven to from city bowl to Century City five times! Every time I go the consultant that I deal with promises to call and advise the progress. It never happens! I am not the only irate client! Clients think that they are dealing with Samsung so it is not good for their name either! I have never seen something like this!