I, too, was told off as if I were a naughty schoolboy once for using a geographic number to get through to customer services for my A&L premier a/c.
I have since tried putting 1-4-1, so as to withold the number, before dialling 18866 and the geographic number, and have had no more attitude or questions.
If they still ask where you are calling from, just reply the Irish Republic - they have no means of knowing.