SIM Swap - or lack thereof

Good day. I went to an Mtn store on Tuesday afternoon to do a SIM swap. I was told this would take 2 - 24hours. It is now been 41 (yes, FORTY ONE) hours later and still no active SIM! I am paying for my contract and expect to get service delivery! When I phoned the call centre yesterday to enquire on status update, I was told it is all up to the network but should be done in 24 hours. This I knew already and does not solve my problem! My fiance did a SIM swap with Vodacom and his was up and running within 2 hours. Please resolve this ASAP!