Nedbank and ATM deposit - not resolving technical issues and releasing funds

A potential tenant of mine made a deposit for the rent on Saturday past. His money was retained and the following message provided on the ATM slip: "Sorry, we cannot confirm your deposit at this time due to a possible technical error". On Monday I phoned Nedbank to get this sorted our and received the Reference 551 749 48. The money still didn't reflect today and I phoned again. Nedbank says it will take 2-3 working days before it will reflect. I can't allow the tenant to move in until I have proof of payment. He was supposed to move in on Saturday. So the poor chap has no place to sleep. Surely Nedbank can make an effort to resolve these issues as a priority! Then while I was speaking to the call centre person, he realised that my bank account was a business account and wanted to put me through to the business division to start the whole process over. This should be irrelevant. Nedbank, please just sort this out. This is so poor service and unfair.