Nedbank

So I had a bad experience today at Nedbank, someone sent me money through Send iMali on the 18th around 23:30, and the send iMali text came through and it was written on the message that the OTP pin will expire after 48hrs, so yesterday which was the 17th around 22:25 I went to withdraw the money, and it didn't come out, instead i got a receipt telling me that my OTP pin had expired, which was confusing for me cause it had not even been 24hrs since the money was deposited. So today the 20th around 15:00-16:00 I decided to go to a branch in Fourways Mall and that was proved futile, because I spoke to a consultant and he was not able to assist me and asked if I wanted to lay a complaint? And I said I did, so I was referred to the complaints service line... I tried explaining to the guy that I couldn't withdraw my money, so asked for a new pin because I couldn't get a new one when I tried to on my phone, he told me that they couldn't assist me, so I told them that I asked the person who sent the money if the money had been reversed and he said it had not, and even sent me a statement showing that the money had really not been reversed, the consultant confirmed this and said it had not been reversed,but I cannot access it.. I really need your assistance because I really needed that money to go home.