PROBLEM WITH MY IPHONE

Hello,

I had a problem with my mobile hotspot so i called Career because that was written in my options, so I found the number for Croatia on internet and lately after they told me to restart the phone they called me back from Irish number: +353 214259200. I am afraid that this number is not your apple contact and now I'm scared that someone can have permission to enter my phone and everything. I blocked all my money cards but now im afraid for mobile files and all other stuffs because they asked me about my IMEI number and i gave it. Can you please tell me is that your number and employees?