I have the 75 GB Fat Pipe Package with the 18:00-06:00 Uncapped Bolt-On (Legacy account which allows this combination).
I had about 100 GB roll-over data.
This morning I checked my account:
There are no roll-over data available. 

If I look at my data usage in October it seems that the data used during evening from 18:00-23:59 was subtracted from my accumulated fat pipe data. (i.e no uncapped Bolt-On during that period).
The daily usage stated:
Standard usage : 289 GB
Zero-rated usage : 62 GB
I think the Zero usage are on the new Fat Pipe accounts for the period at night (0:00-06:00). So it seems that VOX have changed my account to the new Fat Pipe (ie no after-hours uncapped bolt-on, but only zero-rated data between 0:00-6:00)
However:
On 28 October I received a data notification e-mail stating that I have used 50% of my 75 GB Fat pipe data.
Also my account overview stated that I have the 75 GB Fat Pipe with the Uncapped Bolt-On
I seems that VOX have update their client zone interface but in the process messed up my account. The help-desk at VOX are also not very helpful. They state that the "Fat Pipe-Uncapped Bolt-on" is not available anymore. But I know for a fact that it is still available for legacy accounts.
Does anybody else have the same problem ??????