Need hel

I have a customer of telkom for some time and I migrated my service from the 20 gig day to the uncapped.the issue is that iv been told my service is now uncapped but now it's still on the 20gig day time.iv logged cases and cases .but still it hasn't been sorted out and I'm being charged for the uncapped plan.its been over a week .the store in the phoenix branch . Are very un halpful as they changed my service and are not interested in helping.they keep saying that it's active on there side.i need help