DON'T GET A GALAXY S6 EDGE PLUS FROM MTN

I bought a Galaxy s6 Edge plus from MTN on contract on Friday 4th September 2015. I used it for the weekend to discover last night that I am unable to receive calls on the handset if it is on the LTE setting. I called MTN store and they informed me that all the customers who purchased this handset have the same issue. I was told to put the handset on 3G settings which will allow for incoming calls. NO! I bought an LTE handset that costs R15 000.00 I'm not going to drop performance. I contacted Samsung who tested the handset and informed me that the handset receives calls on the Vodacom network on LTE but that MTN had experienced difficulty receiving calls on LTE with this handset. It appears MTN had not configured their network correctly for this handset to work. I contacted MTN technical, MTN coverage and MTN customer care and I was told that they need to re-provison my sim. This was done but changed nothing. I explained to them but it seems no one in any department remotely cared about what I was telling them. MTN needs to sort their technical issues out. I will be returning the hanset and cancelling the contract as well as all my contracts up for renewal. So disappointed