HeatherShep

We have a client who has moved to an engineer who has recently left us - under a cloud - so standard procedure, we changed all out engineering codes on the next service visit (which was booked a for a few days after ex employee left). The client is now shouting from the roof tops at how unethical we are as a company because we wont give her our new code ready - for ex employee to take over the system (and any others he can get his grubby hands on no doubt) - I've tried explaining why the codes where changed and the security risks involved etc but to no avail. Is there any legislation I can quote to stop the rants? Any help gratefully received.