There are so may mortgage brokers around, it is very difficult to find a good one, who actually cares and provides a personal service. It is best to go through recommendation. I wouldn't use any broker, affiliated to an estate agency.
The problem is, now we've had all the problems with Northern Rock etc, mortgage companies are crossing every T and dotting every I, before they lend money. You will find that they will be dragging their heels, asking for more information and things may take longer than it would have several months ago.
I expect you will get the mortgage, you are, afterall depositing a large chunk of your own money. It is normal for the lender to instruct a survey to be done, as they need to have a valuation of the property. If you are saying your broker has taken another �800 in addition to the �330, you really need to ask him what he is doing, it could just have been done in error. Get your solicitor onto it too.
The only problem is, surveys' are only valid for 3 months, so if this continues to drag on, then you risk having to pay for another survey to be carried out, or if you are in a chain and the people you are purchasing from, may get fed up and pull out. You will, therefore, lose any monies you've already paid.
But do be more forceful, it is your money so don't take everything at face value. Don't be affraid to ask your mortgage broker very up front questions. If you don't assert yourself, they will tend to take a nonchalent attitude.