Lte not working on my sim

<p>I took a contract with Vodacom on 19/01/2017. I converted my prepaid number to contract. Since then my LTE service is not working. I tested another sim in my phone and the LTE on my phone works fine, but not my sim. The people at the shop logged multiple calls but my lte is still not working. It has been almost a month just to get this working and its still not fixed! Your new c3d system is useless if you can't even fix a basic problem. Please fix the LTE service on my sim!</p>