How can I help with this please?
What i need to know is what is your question about this please?
You would need to contact customer services about the cost of a phone call as I am never involved in the billing of this site.
Do you know his address? Don't give it to me but do you know it?
You can always sue him at the small claims court.
Actually his last known address is perfectly adequate from the point of view of service. The reality though is that you may well need an actual address because if he doesn't pay you will need to send bailiffs round which is pointless unless he actually lives there.
I would send him a letter before action though. It will protect you from costs.
If that fails then you could issue against him here
If you are concerned about whether he lives there then you can always use a tracing agent but I wouldn't advice it at this stage. It will only cost and it will achieve nothing immediately important.
Can I clarify anything for you?
Yes, fairly. It is a simple enough case so there will be no need for the cost of a solicitor.
After you have rated you can ask follow up questions that are related.
The question won't close from your side.
No, just sue.
The police will not be interested as this is a civil matter.