Cannot connect to O2 UK

When I try to connect to O2 UK my acces is denied
the used params are

profile 100 Europe
urat = 7 lte-m
apn = ‘hologram’

used module = Sara R422S from ublox
the are on the list of hologram

can somebody help or has the same problem

O2 in the UK has recently stopped supporting roaming operators. The behaviour I get is constant creating/deleting of sessions and so never connects. I have switched to Vodafone (23415, 9), but it is NB-IoT only.

Thx Gravin same problem so an other provider than can be the solution.
we contacted hologram and the answer is they are rolling it out.

the solution from hologram side was reallocate the device Hmmmmmmmmm

thx again