I suspect this isn't an issue on a BT Retail side of things, most likely somewhere in the Wholesale network.
You're connected at 330, so the OR network is doing what it should be. All data throughput is ultimately controlled by BT Wholesale.
I suspect this may take a while to fix and you may have to seek an alternate route within BT retail in order to get this sorted. Doesn't sound like something the standard help desk route will be able to resolve, certainly not within a reasonable time frame.
OR engineer spoke to wholesale whilst here. They couldn't find anything wrong. The only alternate route I think of is to contact MrSaffron directly but I don't what his relationship with BT OR/WS/Retail is?
Appreciate that, but I know when I used to work in the executive level technical complaints for BT Retail a few years ago (Dealt with Mr Ferguson myself

), a lot of the Wholesale calls were also handled by offshore call centres so engineers were often faced with similar issues to what customers were when speaking to call centres not based in the UK.
This would appear, from my lengthy experience, something which may require a specialist in one of the back end Wholesale teams to resolve.
Edited by deleted (Mon 11-Jan-16 16:04:08)