If the certificate is for £2500 + VAT i.e. £3000 - you are entitled to a refund unless the certificate is extended.
However, as you no longer instruct your solicitor, the certificate cannot be extended.
At the very least you are entitled to the £500 overpayment.
The above you know.
As the certificate is limited to £2500 + VAT, the LAA will carry out an assessment even if the costs exceed this amount. If the costs are over £2500 + VAT, the court would carry out an assessment but this does not apply in your case (unless there is an order for costs to be paid by another party which I will assume there isn’t).
Where the LAA is to carry out an assessment the LAA has the power to compel the solicitor to lodge a claim. In their fascinating document “2015 Standard Civil Contract Specification” found here
bit.ly/1VUBlex you will see at paragraph 6.33 that claims must be submitted within 3 months of the right to the claim arising (as defined under 6.33).
Where the time for submitting the claim is exceeded the LAA can serve a notice requiring the solicitor to lodge their claim within 2 months. In the event that the solicitor fails, the LAA can disallow the amount of the financial interest of the assisted person (paragraph 6.35 refers).
The purpose of this provision of the Contract was made in order to limit delays in Agency being able to account to legally aided clients for monies owed to them or, in the case of revocation, to prevent the Lord Chancellor’s position on recovery from the client being prejudiced (Legal Services Commission v Rasool [2008] EWCA Civ 154).
So, it seems that your solution is clear – write to the LAA quoting paragraph 6.35 of the 2015 Standard Civil Contract Specification and say that you are and will continue to be prejudiced until the solicitor files a claim for costs.
Charles