cicime

I have a Citroen C4 Grand Picasso HDi 2.0L diesel SEMI AUTO GEARS R N A M Drove home from work car perfect. Next morning handbrake would not turn off and now wont turn on? I can only drive the car in manual not Automatic at the moment Below are the dash errors. I had a diagnostic test at local garage but all they could come up with was ABS No comunication at all??? They also said they could not clear errors?? ESP/ASR System Faulty ABS Braking System Faulty Handbrake Faulty Gearbox Faulty I believe this maybe either a faulty battery or water corosion. What I really mean is I have no idea!!! Any help is so very, very, appreciated .