********** transactions on my account

I have money account with Old mutual and on the 30 April 2019 someone went into my account **********ly and transferred an amount of R1850 into their personal account,I was in a call with the customer service agent when I noticed my Cell phone App pin was being changed while the phone was with me.That person transferred from my account **********ly and I went to the branch after my account was suspended and submitted the required documents until today I have not received my money.I'm so disappointed cause they told me they are going to investigate and it's going to take 14 working days.It's been over a month no feedback.I called the ***** department and they say they are still investigating but it's more than 30 days of investigating.I need my money