No credits for Supreme Call and no response

I'm reporting on behalf of my employer CS Marine CC who have a business account with Telkom. For the past two months no Supreme Call Service credits have appeared on their statements. I have tried repeatedly to contact the Telkom billing department but a) they don't answer b) when someone answers they put me on hold indefinitely c) <br> when someone answers they say they'll put me through to the business department and either b) applies or they cut the call off. It seems to be impossible to speak to anyone who can advise and assist.<br>