HOW LONG CAN BANK HOLD MY MONEY

I deposited a "cashier's check" that Bank of America paid out to me for the money in my checking account when I closed it. On 9/24/18, I opened an online bank account with Ally and electronically deposited the cashier's check into my new Ally checking account (they don't have brick and mortar branches). Because I was a new account owner, they said they needed to hold the check for 5 days to ensure it wasn't fake, etc. On the 6th day, I contacted them and they notified me that they needed some identity documents as they were initiating a fraud investigation. I complied and gave them everything they asked for (and more) and on 10/10/18 they finally cut me an "official bank check" for the funds in my account (the 1 and only check I deposited - no other transactions were attempted or completed). I tried to cash the "official bank check" at every bank in town and every retailer who cashes checks and no one would cash it because it didn't have the bank's return address or phone number printed on it or my address as the payee. It looked very unofficial. So they sent me a lost/stolen check affidavit to fill out and have notarized and said they would then issue a new check. I sent the notarized and signed affidavit to their Operations department as directed on or about 11/10/18. I called today to see why my new check still hasn't been sent out and nobody can tell me anything and they say I have to talk to this one employee (who's phone number they say they don't have) and they can't tell me anything else and that the investigation is STILL ONGOING unbeknownst to me. What are my options to get my money at this point or do I just have to sit and wait. They've dropped the ball a number of times during this process also.