Just had a similar experience. Came over our cell phone. No answer at first, then loud ringing and then a voice with accent said they were calling from some Grant. I told them we were on no call list and not to call us again and I was going to report this call. The person then made a mocking sound back at me and I hung up the call
Same fake grant money scam as everyone else except when I told the lady she had the wrong number she started cursing me for two minutes or so acting very strangely. Kinda creepy.