I received a call from this number and a guy with an Indian accent said that my computer is at risk, You can get more information about this types of scammers here:
https://www.theguardian.com/world/2010/jul/18/phone-scam-india-call-centres
Next time "they" call answer and immediately press 9 then hang up, this should remove your number from their list and end the call if the dialed you using software.