Hi Cecilie,
What operating system are you using?
Also what browser are you using?
As I have just read that if you’re on Windows and have Skype installed. Apparently it will convert numbers formatted in a phone number format to use the Skype call button.
To prevent this use the HTML5 tel protocol like so.
<a href="tel:+123456789">123 456 7890</a>
This stops it from happening.
Thanks,
Danny