Received this text from my estate agent today - received the invoice last Tuesday and haven't paid it yet.
Dear Mr XXXX, just a reminder that your invoice is still outstanding. Please note you have started to accrue interest on monies owing. We will therefore be instructing our solicitors to recover the fee in full plus the interest if we do not receive payment by close of business tomorrow.
There are no terms of payment on the invoice. As far as I know the normal period is 30 days, and that interest can't be charged on a civil debt. Am I right in thinking I can tell him to jog on? I do intend to pay, but in the most protracted and inconvenient way possible (they damaged my house when installing their board and denied everything).