Struggling to get LTE activated on sim card

I bought a new data contact from Vodacom and received the sim on 12 April 2019. It was activated but LTE was not enabled on the SIM only 3G. I contacted them(082135) and was told it will be activated in 48 hours. After that I contacted them again I was told to wait another 24 hours. When I read on the forums, people's LTE are activated in 15minutes. I phoned another vodacom number on Tuesday ( ********** ) and they said they'll come back to me, but they did not. I phoned again Wednesday(17Apr)and I was told it must be my device. Although my normal Vodacom contract's SIM connects to LTE this data sim only connects to 3G. Who else can I now call? This contract is getting useless as in our office building there's a booter where only LTE is enabled on, meaning when I enter the building my device has no connection.