I have been in debt recovery for over 25 years, just getting into carpet cleaning."dont ask" DO NOT go to court it will cost you more money, you have not even managed to contact them yet they may have a genuine reason why you have not been able to get hold of them, do not get heavy handed you must be on the right side of the law especially if you do end up in court how will you appear if you have poured water through his letter box. thats criminal damage, by all means go and visit them speak to them, then write a nice letter asking for payment explaining that the cheque they gave you bounced, then if that fails write again saying you will go to Court to recover this debt if they dont pay within 14 days, whatever you do DONT go to a solicitor all they are interested in will be charging YOU money some debt recovery agents offer no recovery no fee so they will want to get your money overwise they wont make a penny, but probably wont want to recover such a small debt, i know it is frustrating but keep cool even if you cant get you money thats the time to get "inventive" but not yet , good luck