We pay to a Mancommunidad which is what i think you mean. Mancommunidads are as you describe they are a collective of communities within a small area. As the roads, road lighting etc has not been adopted by the local town hall someone has to take care of them and this is what the Mancommunidad do. Ours looks after road cleaning, street lighting and security. Your president should be invited to the meeting which in our case are ever three months or so.