Bad customer service!

I opened an account with FNB in the week. I run a stokvel, the one accounts purposes was for the sake of the stokvel. Gave one of the members mandate to be able to transact on my behalf in cases where I'm not available to do so. A day later her personal accounts was frozen and placed on hold because of some investigation going on with regards of certain funds that was deposited into her personal accounts. I immediately removed her mandate on my account, yet it affected my account and I can't transact with it. I called FNB yesterday I was told by a consultant that I should go into the branch so I can be verified and they'll call their ***** department from the branch and the hold should be lifted. I did that however to my surprise after holding for 45 minutes for the ***** department someone finally answered only for the agent to tell me that they can't remove the hold and that the investigating officer of the person whose personal accounts was frozen can lift the hold. I called again today after holding for 30 minutes someone finally answered and once getting through to the ***** department they advised that KYC will be able to assist, after going through to 3 different departments an hour later on the line explaining myself over and over again I finally get through to the KYC department whereas they advised that they can't help with uplifting the hold and I should await the investigating officer to uplift the hold. The person who had mandate on the account sent the investigating officer whose name is Achmat Bennett an email yesterday and tried getting hold of him to uplift the hold on my account as it wasn't hers she only had mandate. I don't get what that has to do with the investigation. So can Achmat Bennett please assist with this situation as the stokvel clients thinks I ran away with their money and they need their funds however I can't transact at all, just because of a mandate that was given to one member. This is ridiculous and the service is pathetic.