exhaust/dpf

[stepol65]

Hi all.
I am new to the owners club but it was recommended to try to find the solutions to my problems.
I have an 05 megane sports tourer 1.9 diesel.
I am having problems removing the down pipe (flexi to dpf)
I cannot get to the nuts/bolts & those i can get to are VERY siezed.
Also the 2 nuts on the dpf holding the sensor & pipe have snapped so need to find
somewhere who supplies them hopefully in the uk.
Any help would be greatful.
thanks in advance.