Who called from 5734084234

A charge for $12.77 appeared in my checking account.  This is the number associated with it, but when called I get a not in service message from Verizon.  I do remember getting a call on the 12th about a lost credit card.  It was a recording and I just hung up.  I've not lost any credit card to my knowledge.
The entry says BLS*weblearn along with the phone number given above.

I found the phone number from which the call came.  I tried calling it, but only got a busy signal.  It is 8888754520.