SCAM - man with accent no name or where from tried to keep me on phone and then my phone froze and could not cancel call - had to power of

sounded like a person with accent - would not provide his name or details - i went to hang up and person kept trying to keep me on line then my phone would not shut down his number or turn off - it froze - got to completely shut down phone - believe scam and trying to get into phone to retrieve information.