You need access to vida/dice, before trying to replace the actuator.
The turbo actuator is controlled by the ecu, you can test and calibrate it with vida, it's generally only available as a complete turbo assembly. It's relatively uncommon for them to play up.
If the orange seals are oily, and the mounts are broken on you turbo pipe, it will keep blowing off.
You could have a sticking EGR valve