Called once didn't leave a message and I did not answer.  Who knows who they are

I didn't answer a call from the number above. Don't know who called.

Person calls constantly, leaves messages for some kind of bank -possibly debt collections. However, all messages are completely inaudible and so difficult to understand, I can only make out a few fragments.

I received this number on my company phone talking about very important business matter and that it they would be available until 8pm Pacific time.  Left the return call number at 888-557-1278.  Didn't waste the time to call back or deal with it.

First Financial Bank.  Left a message after calling 5 times.