Inadequate service!

I purchased a Mtn sim card from the Mtn store at Greenacres mall and unknowingly I got home to find out that the sim card has not been Rica. After visiting my nearest Mtn store, at clearly park shopping center, I was told that they can only Rica a SIM card that has been purchased from their store. This is so ridiculous as the sim card I purchased is from an Mtn store. Further they proceed to tell me that the person at the previous Mtn store should have Rica the SIM card. What kind of service is Mtn is providing? It is very disappointing. This is a clear indication that Mtn stores are not flexible in providing customer services.