16-01-2015 08:56 AM
16-01-2015 09:00 AM - edited 16-01-2015 09:02 AM
090 is not a free phone prefix - it's the prefix for western area landlines:
http://en.wikipedia.org/wiki/List_of_dialling_codes_in_the_Republic_of_Ireland#Western_area_-_09
As such it makes sense that minutes were deducted from your landline calls allowance balance to call this number.
This seems to be who you were calling and they make no mention of it being a free phone number:
https://www.facebook.com/MfmWaterford/posts/352530364854023
Hope this helps.