No feedback on delivery

I ordered a Samsung tablet and received confirmation via email on 27 November that payment was received. I phoned a couple of days after this date to follow up when delivery will take place, but the call centre is non-responsive. You cannot get through at all, the phone rings, then it sounds like someone picks up and puts the phone on another ringtone. I proceeded to send a message on Facebook, I was promised that I would receive feedback, this was on 01 December already. Up until today, nothing at all, worst online shopping experience I have ever had.