Mine has been doing the same thing since about Thursday (31/05/18). Was told to contact 0860 123 000 to rectify. They said it was the cache clear reboot issue. I did exactly what you did with no luck. Was told they'd escalate the issue and send me a reference sms. Didn't happen. I called again but all that happens is I get into a game of ping pong as they transfer me back and forth the whole time.
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