Unfortunately, if what you have tried doesn't get it then your only choice is force till it breaks or the gas axe. If you note in the blow-up I enclose item 158 is all the parts involved if I understand you correctly. Many a time I have burned them apart.
Since the only reason to take it apart is to replace it sometimes the torch is quicker.
BTW also notice that the bolt 142 is threaded all the way. When the car flexs at this point the mechanism of flex is the threading and unthreading of 142 into the un-numbered part in item 158 the carrier. If you are frozen here then all your flexing has been done by the the bolt turning in the control arm. This often wears out the control arm.
In any case burn it into small pieces and replace those involved.
Bosch Master, ASE Master, L1
33 years MB technician