So disappointed in Samsung

Firstly I'd like to start off by saying I am and have been a huge supporter of Samsung.My last 3 cellphones have been Samsungs and I have convinced my family that Samung is the best.I recently (4 months ago) purchased a Samsung S6 via my FNB account for myself as well as 1 for my Husband. All in all I pay almost R1000 per month for the 2 phones. The camera on my phone has always been faulty. It doesn't focus. As a result I couldn't take photos/Videos.I seriously regret upgrading from a Note 3 to this S6. When calling Cust. Service the consultant informed me that the camera was faulty and I needed to take the phone to Samsung in Century City. I took the phone in on Saturday and was informed that they would have to send my phone away for repairs (I had expected a replacement as it was a faulty device given to me upon purchase) . I then asked the consultant how long it would take and she informed me it would take 24 - 48 hours. I require my phone for work purposes and managed this but expected my phone back on Tuesday. On Tuesday after no feedback my husband went to Samsung and was told it would take 5 more days and no-one had informed us. My job requires me to be contactable via cell