Calling for two hours and nobody answers

I have been trying to get through to your authorisations department for the past two hours this morning and cannot get through. I have run out of airtime in trying to do so. This first started off on Friday with your customer service/enquiries department who told me they can help me and then after 3 phone calls I was informed sorry they can't help me. Again wasted my airtime! I need to provide Bonitas with codes to find out how much Bonitas will pay and how much I will pay, but nobody answers the phone!