SBAB why don't you contact Oxford directly and discuss your concerns. From your posting it would appear that communications have broken down.
Oxford frequently talk about their career advice person/people, so much so that they utilise it in their marketing material. I have no connections with Oxford, so I do not know what conditions/guarantees are outlined in your APP contract. An element of pro-activity is now required to try and find a mutually suitable solution to your frustrations. Now, if Oxford just tell you to go away and not to bother them again, then you might have to re-think.
Sagey