I don't really have much information on what exactly they try but apparently they are saying they are from Windows. My girlfriend answered the call but because her English isn't that great she woke me up and I told her they were scammers and it wasn't important. I sadly didn't realize they were still on the phone or I would have found out more. My girlfriend only said that it was some Indian lady she was speaking to and they said they were from Windows or Windows support or something. Anyway here's the number:
I tried to find out but either our phone (it’s a pretty old model) is showing it in a weird way or it is +1 777 6304 5807 which would be an American or Canadian number which is unlikely since it has one too many digits. Usually 00 always means + if it’s at the beginning of a phone number as far as I am aware and I have never used it any differently. I am from Germany if that helps.