No activation after 2weeks

Sammy did a sim swap for me on 22 Aug 15. Excellent service, but Mtn has not been able to resolve and activate my new sim. Sammy assisted and got three ref numbers, yet no-one at the call centre competent to activate my sim, it's been more than two weeks. Joric also assisted and reported the problem himself on mtn active, so assistance from them were great! They problem lies elsewhere. Why is it so difficult? Someone at the service centre must just push a couple of buttons on the keyboard, Mtn at there best!! Please advise, sim is on contract and a data bundle. Will probably loose the data not used due to there poor service , but they expect you to pay your account on date, which it is!!