migration and cancellation

End of November I requested migration at Westgate store. Case number ***3. Nothing happened.I went in store again on the 17th of December case number ***5. Phoning today I heard that the migration has not been done yet. I want to migrate from unlimited @ R 899 pm (this unlimited is limited to 100GB per month-after using 100GB you are not able to use the internet) Migrate to 100GB day-100GB night at R999 pm R100 more per month! Nobody is able to tell me what the migration fees are and why this is applicable as the package is more expensive. Further cancelling my other contract as per the end of December, case number ***3, Contract was cancelled on the 22nd of December (as per call centre info) and not the 31st. 10 days earlier! Unable to reactivate for the remainder of the months. Losing all data still available. not impressed.