FNB connect impossible to connect with

On Tuesday 22 September I took out a new FNB connect sim card. I was told that I could port my number and it would take place the same day. I have not heard since as to why it has not yet happened, despite phoning the call centre on Wednesday morning (they promised to call back), and trying to get through with no success twice (on Wednesday afternoon and Thursday morning). Even my personal banker has not been able to get through to them to ask them to call me back. Not acceptable service!