Scam call to update router

​I received a call yesterday about updating my router from someone identifying themselves as being from Xfinity .  I was walking out the door so I asked them to call me back today. They did and said that they had been trying to send security updates to my router that were not going through. He had me get out my computer and check an area and some Program or something was marked as stopped. He then had me download a program, and when I realized it was an EXE file I did not want to open it. I questioned him, and he assured me nothing would happen. There was no problem nothing would happen. I became very suspicious asked for his name and number , and then the line went dead. I’ve called the phone number and someone again with an Indian accent answered Comcast. I hung up two minutes later I got a call that although it was from the 470 area code simply said United States in my call location and the person said that they were from Comcast that I had just tried to call them. When I said I was trying to determine if they are phone calls to me were scams or not. They hung up the Phone , I assume that means they were a scam. I have not seen much on this type of scam. Has anyone else experienced it ​