Absolutely no idea who this number belongs to (shows on display as 0198339999) - in the past 30 minutes they have tried calling since 9:15pm - now 9:45pm. Who would call at such an unprofessional hour??!

Answered the call, and got a message saying: "Please standby for text to talk message."
Hung up immediately!!

Have had 12 missed calls from this number at all times of the day on my work land line, cant call back.

Rang five times between 9:15pm and 9:50pm - ignored all calls (not displayed as 07 - 01983 3999) finally answered on fifth call to get a recorded message from Wickr (??!! - encrypted mobile app who CERTAINLY don't have my unlisted home phone.)
Talk to text message... ??????