Brake disc removal

[rzrz]

Because of vibration in the steering wheel during braking, I want to replace the brake discs. However I cannot get the nuts off that keep the spacer in place. Tried WD40, hitting the wrench with a hammer, heating them and a long piece of pipe for leverage. Nothing worked.
Someone other tips or tricks?

[rzrz]

[rzrz]

I have the car for 16 years now. The previous owner must have changed it.

[rzrz]

Thread is normal rightsided as far as I can see. Also tried turning them the other way around,also no movement.
Used a 1.5 meter tube for leverage.
Rear wheels don't have spacers.
I will try a garage I think.