What are we paying for???????

Honestly i have no where else to turn to try get my point across to someone and get some action. I have seriously never met my "Private banker". Every time I send a mail i have to follow up and the response comes from the assistant, am i paying assistant banking fees or private banking fees, oh thats right private. I performed a transaction yesterday and collected the goods on the strength of the POP. This morning a very angry supplier called me and accused me of all sorts as the payment has still not cleared... I raised the question with investec as to how and why. I was told payments after 1 in the afternoon can take 48 hours!!! Are you joking, do you not work until 4 like the rest of the banks in the country. You have caused me immense embarrassment and tarnished my name and reputation which i cannot accept. I cant continue to bank with an organisation as unreliable as this..... Would be better off with capitec at this rate....