Architect Quote To Pay Or Not

[getpooh]

I got a quote from an architect and they said its.
A ) To measure existing and prepare as existing drawings: £700 plus VAT
B) To prepare design drawings and submit a planning application to the local authority: £600 plus VAT
They did the existing drawings (A) and the design drawings of part B but did not put in planning submission as the project was spiralling out of control and I couldn't afford it.
I never asked them at any time to submit planning permission. However they have charged me for both parts A and B total £1300. I don't believe I should pay for any of part B as it clearly says "and" submit planning application. I have offered to pay part A but not part B. What does the law say?