Contract Sim not working

So I am a contract holder with Vodacom for the past 4 years, have been on a prepaid for the past 10 years. My Issue is on the Contract which was due for an upgrade and I took the offer for 100gig which was due to start from the 01st June, from the 31st May my contract sim did not have network and I called the customer care line and I was advised its due to the changes or upgrade happening on the 01st June 2022. Today is the 20th of June my sim card still does not have network and I have tried to call the customer care which is not helping, I tried to change the sim card I was using by doing a sim swap thinking maybe the sim card was outdated but still even the new card does not have network and at this rate come month end they will need their money to which my agreement is for a service which I am not getting at the current moment.