Not receiving our post due to insane An Post rezoning

I hope this is the right forum. Can anybody help me with who I need to contact in An Post about this situation and how I go about doing it?

Our house is in a rural area on a small loop road. The postman used to always drive around the loop and we're about half way down it. For a few weeks every year, a small part of the road is flooded and the postman would have to go down each side of the loop separately. Although inconvenient for him I'm sure, it's never caused any problems with anyone getting their post.

In the last few weeks, they have rezoned the delivery routes here so now there are two postmen working out of our small post office. Postman A drives down one side of the loop and the last house on his route is our neighbour, almost directly across the road from us. Postman B drives down the other side of the loop and we are the last house on his route. His next to last house is about 250 metres further back up the loop and it's the bit of the road between us and that house that floods. So we are the only house affected by the flooding.

Now the road is in flood and Postman B can't get to our house. Apparently, he's not allowed come down the other way as that is Postman A's route. He's also not allowed pass our post to Postman A to deliver, even though Postman A delivers to the house almost directly opposite us and that route would never be affected by flooding. Even apart from the flooding issue, we are so much closer to the neighbours on route A it seems bizarre to put us on route B. It's obviously all been done by Eircode by someone who doesn't know the area.

So far, their solution is that we should have to go to the post office to collect our post. Clearly, that's insane when our house is perfectly accessible. We have just been to the post office to collect two parcels that we knew about as they were tracked, only to also be handed a card someone had sent to my daughter that we didn't even know would be there. So are we supposed to ring the post office every day to check if there's post for us? I could probably put up with it if it was a freak incident but as a long term plan, it's not acceptable.

We've been told we need to contact the head office in Galway to complain about it because our local postmen are just told the rules by them and can't do anything about it. We've also been told they have no idea who in head office we should contact or how. All I could get from them is that it's the depot on the Tuam road who we need to deal with. I've just spent the last few hours trying to communicate with someone and am hitting walls everywhere. I can't even find an email address. I'd really appreciate if anyone here can help.