Samsung S5 mini technical issues

I upgraded my Vodacom contract at the end of February and took the Samsung S5 mini. I had the phone for a few days and I realised that the Mobile data connection was disconnecting a few times a day. I had to use the flight mode to reconnect. I took it to the customer care branch in Menlyn where the technician said that he will have to send it to the repair centre to be fixed. It took about 2 weeks and when I got it back it had exactly the same issue. I went back to the same branch 3 days later on the 20th of April and Jaco said that it has to go back to the repair centre. While standing in the queue one of the Vodacom staff members told me that the phone has been discontinued before I got it as it has been giving too many issues. It has almost been a month and I still have no idea what is going on. I haven't received any feedback. <br> <br> This is terrible service as I'm paying for a discontinued phone for a few months and I have only had it for about 2 weeks.