Called three times- no message- so annoying

I wonder if these are linked to visiting LinkedIn? I seem to get these calls after visiting that site.  I hope not. Blocking

I called this number back and there is an option to add your number to their 'do not call' list.  They've been calling me like crazy for days - with various different numbers.  When calling recording only states thank you for calling customer service.  I added my number - we'll see if it works.