Thank you for the question, in the first instance you will need to try and resolve this from the landlord. If you named in the fund you are acting on its behalf, so the landlord cannot prevent you from obtaining your own property. If the landlord proves to be difficult, you should write a letter before action. This can state you will take legal action to obtain your property, if you need to do this you could look at claiming against them for your legal costs. In addition you can state that if their actions cause any loss of earnings, you can claim for this too. I would let your client's know there is a delay in service but do not suggest their information is subject to a data breach. IF that was thee case you would need to report the breach to the ICO.
I shall provide you with a helpful link that will assist you in finding a solicitor/representative near your local area. This will provide you with someone nearby your area who can assist you if required.
I hope this information proved helpful. You will find a local solicitor who deals with these matters on the law society webpage which is as follows;
https://solicitors.lawsociety.org.uk/ (England)
https://www.lawscot.org.uk/find-a-solicitor/ (Scotland)
https://www.lawsociety.ie/Find-a-Solicitor/Solicitor-Firm-Search/ (Ireland)
https://www.lawsoc-ni.org/solicitors (N. Ireland)
Hopefully, I have answered your query in a way that is simple and easy to understand. If anything remains unclear, I will be more than happy to clarify it for you. In the meantime, thank you once again for using our services.
Should you require any further assistance on this matter, please do not hesitate to post a further questions for additional assistance.
Kindest Regards.