Unprofessional Debt Collection Conduct

My wife recently received a sms from VVM in connection with a Telkom account, apparantly claiming that she owe Telkom money. I called the number provided but after waiting for 10min online, the company cuts off the call. This morning I received an e-mail indicating that a status change has been made at the CPB Credit Bureau and if I wish, I can call them. E-mail came from a no-reply address. Again called, left a request to call me back. Called again 3 times, Call ended by them 3 times. It is most amazing that a debt collection company can simply change a status on the ground of a third party's information without providing any evidence or obtaining information from me. I reported them to the ombud in an attempt to reverse their unprofessional and unjust conduct. Am I the only one with this experience? I managed to find an e-mail address and will try it.