Small Business banking Not answering calls

No Service. Numbers on internet for contacting nedbank don't work. Number has changed & they don't list it. Call centre customer service non exsistant as they just put you thru to long cues of no less than 15 mins still no answer. Phone back, you back of the Cue again. My payments have been returned to my account. Internet is off. What is going on with you Nedbank. Call centre's are not equipped to deal with business banking