Sim Activation after Upgrade

I do not understand how MTN operates. Upgrades should be a standard operating procedure, but they mess up this routine process as with everything else. I was issued a LTE sim with my new handset when I upgraded on Saturday 31 Jan 2015, which I was told will be actived within 2 - 24 hours. Five days later, nothing and the old sim is still active. After a long call to 808 and being passed to another 083123xx number, they tell me I have to go to the branch where I upgraded (which is 64 km from my residence) to activate the sim. They give me the branch tel. no: *** which by the way is not working (I called and called).<br> <br> Do I really have to go back to the branch, ridiculous!