I just got a call from this number

I did to it was a lady speaking spanish. it was a recording of her talking but i speak spanish and she said that i won 4 million dollars on a ballot i signed up for and my name was chosen and wanted me to sign up right then i hung up but i thought it was weird i never give my phone number out when i do a drawing just my home phone never my cell but and hour later it called my house phone so then i started to friek out. So i went to Sprint and had them block the number from calling me. This has called me twice now both at differnt numbers too so im verrry suspicious!