Are there any chiptuners offering removal of the dpf in your country?
Because that's the only thing you can do. The system has become to complex for dealers to fix. And that's not just with Ford. Other make's have the same problem too.

Otherwise keep looking at the dpf pressure sensor. Maybe a new sensor and a new set of hoses will cure the problem. Also check exhaust temperature sensors during regeneration.

Check your oil level often, if possible every day.
When the level is rising renew the oil.