Hi Kev975,
Thanks for coming back to us on this and apologies once again.
We understand your concerns and can only apologise for how frustrating this has been for you. When you qualify for Volt, both VM and O2 need to apply your benefits separately. The VM benefits are applied by VM and the O2 benefits are applied by O2. Neither can apply the benefits to the other so as you are receiving your VM benefits, O2 have to apply your O2 benefits.
I'm afraid as we don;t have access to O2 systems, this isn't something we can do.
As explained in my previous post, it's worth checking your online My O2 account to ensure you've opted in to receive the benefits there. If it advises that you are already opted in, or are unable to opt in then the only ones who can resolve this will be O2. When contacting them, make sure you make clear that you are waiting for your O2 benefits to be applied and that your VM benefits are already applied.
Apologies once again.