1) OP, go back to back street entrepreneur who removed the DPF, hope they still have it and get it refitted and your remapped back to original.
2) Go to a decent garage and get the underlying problem solved,
3) If above not possible be ready for instant MOT failure, possible fine (new bill passed earlier this year) and the expense to rectify.
These garages cutting out DPF are incompetent, telling unwary customers its the solution, yet leaving the customer screwed down the line.
4) As to EGR, these can be taken out and cleaned. They coke up, take it our, brush out as much carbon as poss, mr muscle or carb cleaner, it will be good as new.
5) Good luck, be cool.