No service but they expect payment

I have an agreement with Edgars of which they offered me airtime from Vodacom and I pay it via my Edgars account. It’s been a year exactly with no airtime allocation from Vodacom yet my Edgars account has a balance owing. I received an sms from Vodacom about technical issues and the airtime will be allocated in the month of May. Still nothing. Now I’m receiving messages from Edgars that I should pay the amount owing on the Edgars account. This is affecting my credit score badly and no one is helping me with this issue. I spoke with many consultants from Edgars and still, no help. Why should I pay for a service not rendered to me