Disappointing service

I app**** for a contract online which was conditionally approved and received an email to forward my docs for verification purposes. All that was done and I received another email notifying me that I’d receive a call within 24 hours. This Mor I’ve received 3 calls from ‭***‬, every time I answer the person hangs up and I receive an sms saying that Vodacom has been trying to call me... I tried calling the contact center as I can’t get through. Somebody get back to me ASAP