Call back got fast busy ... blocked

Called, left no message.

Called and no one on line. Called back and says disconnected

Scam artists calling about raising your credit. They asked if I wanted to raise credit on my home, boat, or cards(I think that was the last one) and I said "Well you called so you must know basically where I'm at with all that right?" They hung up on me immediately. I tried calling back - "That number is not in service." Like I said: scam artists.