Got a call but was rejected call back mail box is full. I put all nuisance calks to reject list the best way so never have to pick up the calls eventually the give up.

Cannot find any info on this number anywhere when I called it back the first time they answered but said nothing so I called again same thing but third time it said that mailbox was full? WTH?
Usually I can find some other complaint or info but with this one - nothing