ESP/ASR Auto Hanbrake failure

[Lcs1010]

Hello all I'm new to this forum and need some info hopefully someone can help me. I have a citroen c4 picasso vtr+ 2ltr
I recently came back from Wales and got roughly half way back and my car shut down and went into limp mode. At first i couldn't get the handbrake off but after a bit of messing with it it eventually cane off. Now I have the ESP/ASR Fault and Parking brake fault. The parking brake doesn't come on automatically anymore but can be used manually.
The service light is on as is the ESP light and the auto parking brake light. I've also had the engine management light come on and off and on and off whenever it likes I've had it plug in at a garage it comes up with turbo and egr which have both been replaced but still comes up saying they broke. Then after a couple of days the engine light will go off ( I should also point out that there is no power difference when the engine light is on or off you wouldn't notice the difference). Thanks for reading hope you can help.
Also the dpf is new and the ecu has been told that it's new, also I got a new handbrake switch.

[GiveMeABreak]

We'll need your VIN and the specific fault codes as there are a LOT of possibilities.