Why can't you get anything right?

Good day

I have recently after much issues ported my number to the vodacom network as a prepaid account. I have now decided on a contract option and have been trying to sign up for the contract with my very same prepaid number. After numerous calls to the vodacom porting department where initially my number was not fully active I have made zero progress. The recurring message is 'MSIDSN is not eligible for pots-paid Activation. MSIDSN is not available or does not exist"

The consultant that is trying to process my application is now avoiding my calls as this process has become really frustrating. Why does this have to be so difficult