Standard Bank Canal Walk do not answer their phone

I have been trying to get hold of the Canal Walk (in Cape Town) branch for two days now. No-one is answering the phone. I have called the customer care hotline ( ********** 341) and when they put me through to the Canal Walk branch the same thing happens. The phone just rings for between 3 and 5 minutes and then you just get cut off. For a branch of a bank in one of the most prestigious shopping centers you would assume that they would answer the phone! This is ridiculous!!!