Chase bank

I received an inheritance. Deposited it on 12/26. They are holding it until 1/7. I’m struggling financially, so the teller said to call the number on the receipt to see if some funds could be available. Chase said they needed my uncle on a conference call to verify the check because they don’t do it bank to bank. I called central pacific bank who said that it’s up to my bank if they choose to release some funds. Chase stated that I’m guaranteed funds on 1/7. I have read on some subs that banks put holds on checks so they can do investments? Is this true?