I'm trying to keep things reasonable, but just really annoyed that the customer chose to complain after 2 months, hence the question - memory fades and all that. I have now added a line about querying within 7 days or tough **** to invoices. (not in those exact words).
Invoice value, not huge, around £600, so not worth spending too much time on.
We've had payments for certain aspects of work done, trouble is the guy employed a lettuced builder, who was supposed to be doing the first fix (job was re-instating electrics after repairs caused by damp, property being a barn conversion worth around £1.7million). I didn't give a fixed price, but an estimate to re-instate sockets ie 2nd fix, and test circuits on completion. I ended up first and second fixing, and repairing cables and fault finding, as well as other works the customer asked for, like 'check everything is safe'. I didn't help that the customer was away in Spain having sold his house there and moving back to UK. So job went a bit pear shaped due to others, as usual!