I complained and got the same reply, but they added I would be contacted by the responsible department (which I still haven't, 3 days later).
In the meantime I checked the lounge locator just to be sure. They do not any longer offer lounge access to any pax (not even C pax) in ORY, MXP, MAD, BCN, BLQ, VCE, FLR, etc. They are completely out of their mind.
I would strongly suggest that all gold pax complain to the Miles&Go Gold hotline or email.