Called back and if you don't use the phone they called you get dropped. It's a scam www.heycosmo.com is the website. Just incase you all wanted to know it. Now you have the info do what you want
Just got the call/hang-up. Thankfully, I have the ability to block calls on my cell. If you also have that feature, suggest you block the number so you don't have to deal with them in the future. I know it wasn't a collector because I have no debt...