That's about as bad as it could get unfortunately. You shouldn't be showing as available to order at all.
They thought from survey they could reach you from a CBT on the other side of the building which they cannot.
According to all this they cannot put a CBT on the outside of the building on your side as there are too many units and will probably have to treat it as an MDU. I'm unclear how many units are on the other side but it seems they were able to use an external CBT to reach those.
There is the possibility they'll be able to treat you in the same way as the other side of the building but they don't seem optimistic.
There is no quick solution here according to those messages. This may take months, longer, or may not happen at all depending on the solution they end up using and if it hits obstacles.