vodacom help

<p> I have a new router 10gb, 2 year contract. Vodacom cannot get 4g to work on this contract. The Plett Cellular shop have been fantastic, they have tried everything. I have tried everything. My existing router and SIM work fine on 4G. My new router and old SIM work fine on 4 G. My existing router and new SIM does not work on 4G. The problem is related to the cell number/SIM. Vodacom say the LTE APN is enabled for the new number. But still it doesnt get 4G. I live within 800m of a 4G vodacom tower. My existing router and new router both work with my existing 4G SIM. The existing SIM works with 4G in either router. The new SIM doesn't. But can anyone fix it. If only one could speak to a network guy at Vodacom he would fix it in an instant I am sure. Help!</p>