DSTV Complaint regarding lack of service and assistance

We paid our DSTV account on the 12/08/202, yet our account has not been activated and we cannot view any of the channels. We made calls to their call center 3 times with the same error E-16 message yet they all failed to assist and had the nerve to tell us that the subscription is only valid for 30 days beginning on the date when the payment was received. 7 days have passed, we still cannot view the channels on the premium package that we have paid for. The management Team is not getting involved. To say we are frustrated and disappointed with their lack of service is as understatement!