Can a second hand one be configured to my car or do I need to buy a new one?? I have been quoted £340 for a new unit

Thanks
Adam

Hello This is my first time posting in the forum. Any help is gratefully received. Basically, my electronic hand brake will not work when using the handbrake switch. To get the handbrake to engage I have to turn off the engine. To get the handbrake to disengage I have to pull off in first gear. My f...