Letter received from Debt Collection Agency.........looking for my neighbour ??

Yesterday I received a mysterious letter in the post from FCM (First Credit Management Limited) with instructions to phone a number and quote a reference code. This was a real shock to me as I was'nt aware of any debts I had, and had certainly not received any previous letters from anyone saying I owed them anything. I did'nt want to ignore it as I worried that they might come knocking on the door looking for money, so, after a sleepless night of anxiety, this morning I rang them and asked them what it was all about.

Well, Imagine my suprise when I was told that they did'nt want me personally, but they were looking for my neighbour down the road who owed them money, and as they had'nt been able to find him, they thought they would contact all his neigbours to see if they could help. After my initial relief that it was'nt me who owed anything, my mood turned to anger at what this company had done. I asked them how they could justify sending out these cryptic letters to innocent people who have nothing to do with the "client" they are chasing for money, especially as Im sure Im not the only one of my neighbours who was worried when they received this. Imagine the distress an elderly person getting one of these would have when its nothing to do with them. They simply said they had tried to find him and thought this might help. They said sorry for contacting me and would'nt bother me again, but is that enough ?

Anyway, my question is, can I complain to anyone about this ? Im outraged that a debt collection company can send letters to ramdom people who have nothing to do with the debt, especially as the letter does'nt say WHY they have contacted you, which means you have to go through the worry that I have just been though.

Sorry to waffle on, any help or advise would be greatly appreciated.