Plumber undertook to do some work for us. Asked for half the money up front for parts and has fobbed us off for weeks and now is not responding to calls or messages. Last communication was that he couldn't do the work any more and would wire the £600 back to us. Cock and bull story about payment pending but it has never arrived and he will not respond. Sick of it and now want to escalate. Is the best thing to do to pursue him through the Small Claims Court? He does have a Companies House registered business LTD status.Any advice much appreciated.