Thanks for all the positive comments - unfortunately there has now been a problem with the order which I hope can be solved!
As getting an Audi (lifelong ambition) will really stretch me, I used carwow to get a starting quote. Unfortunately, inadvertently (honestly) I got a quote for the A3 rather than sportback. However, neither I or the salesperson and finance guy spotted this, so the Sportback was configured, I received an order form and a deposit was placed clearly for the Sportback. I have now been told that when trying to push the order through, the anomaly in prices has been spotted and has caused a problem in the order process. The upshot is that the sales guy has indicated that the order will probably be refused by the dealership - which I am obviously not best pleased with. I have now spoken with the General Sales Manager and we have a face to face appointment later in the week to discuss further. I am praying they will do the honourable thing and agree to proceed as things stand.
If anyone has any advice, I would appreciate it as it was an honest mistake from me but I feel that as none at the dealership spotted it and the order has been placed, I should not be penalised. As to whether I would receive a facelift/pi model (if the order goes ahead) is still unknown as the response was it will probably be a current model, but it might be a facelift/pi model!