Unlock Siemens IPC427E in Pune

I have a Siemens IPC427E microbox running a live process in Pune. The unit is currently write-protected, and I need the ladder logic opened up so we can tweak a few operating parameters inside the existing functions... (Budget: ₹1500 - ₹12500 INR, Jobs: Automation, C Programming, C++ Programming, Electronics, Embedded Systems, PLC, Programming, Software Architecture)