i call bullshit
this doesnt make any sense.
1) if the miscreants ALREADY had your teamviewer id and passcode why would they bother to phone you up?
2) if TV has been breached (which i dont believe, more like crap passwords, reuse of passwords, 4 digit passcode enabled on TV instead of 10 digit) and they had access to your machine, why would they bother to phone you up?
if, on the other hand, they phoned you up and you are a gullible twat and gave them your temaviewer id and passcode, it all makes sense.