Standard bank account frozen

My account was frozen by standard and the reason behind was that large sump of money was deposited into my account and on Friday I was called by a lady called Nikita from standard bank and said that she got a verification from where the money was coming from so they will send me a link to verify myself so that they can unfreeze my account but since then they have not sent it and every time I call they tell me Nikita will call me soon and she never calls and I don't have access to my money and they don't care if how I am surviving without money since all my money is in that account they have freezed