Mistake by Vodacom and I'm left in the dark

I contacted Vodacom on the 27/28 of June 2019 to migrate my cellphone contract from an S+ package to a L+ package. Everything went 100% and the agent said everything was done. Yesterday, the 7th of July, I received an sms from Vodacom to indicate my voice minutes are almost out of bundle? I realized something was not right and contacted Vodacom last night. The agent said my other number was migrated! I told her to download my conversation with the person who helped me. I was on hold for +- 35min. The agent then told me that Vodacom made a mistake by migrating the wrong number and the agent who helped me wil phone me today. She did confirm he is working today and it wil be very difficult to amend the fault. This is not my problem. No one has contacted me today?? I have three contacts with Vodacom and has been a customer from 2004.