How much help and consultation is reasonable to expect from an accountant?

It entirely depends on the service you signed up to. Yes, it can be as simple as a final review of your prepared statements at the end of the financial year, right down to you collecting up your invoices say once a week and sending them to the accountant who will write up the books of account, pay the invoices, handle the VAT returns, prepare the accounts, submit tax returns etc...

Normally you will receive a letter of engagement from your accountant, it will set out the services you both have agreed he will provide and details of how the cost of those services will be calculated. I'd suggest you revisit that letter, decide if you have signed up for the services you expected or are you just not getting the services agreed, then arrange a meeting with your accountant to discuss the issues.