called number and always busy

Number called at 10:00 p.m.

called about my credit card

They try to call us often....about our computer?

"Dir  Assist  UT"   on the caller ID.  Boy  these scammers  will spoof  anything just to get you pick up the phone.
Likely the same scammers judging from the other comments.  
The scammers and the phone companies are in cahoots with each other.  They both make money from every call placed.
The  phone companies have the power to stop these calls, but until it hurts them financially,  why stop!
Check out callerID4u.com  to see  what's going on.