Bad banking with ABSA

I have a savings account with ABSA. Sometime at year round about May 2017 I had money that was deposited into my account by my attorney of R75 000 but I never incontact for that money. I went to the bank to the bank to inquire about it because my attorney told me they paid me. The money showed in my account but not in my statement and my balance remained unchanged, the money just disappeared from my account. I went to the bank to ask how can R75 000 just dissapper like that. They said something that I could not understand and said I must go do an avidavit for this. I asked why should I do that when the money showed coming into my account then dissapear. Till today I have not received my money and ABSA is not saying anything.