Hello and thanks for your question.
I am so sorry to hear what a terrible experience you have had with the legal profession.
You have every right to make a complaint against the firm concerned. The first step is to make your complaint to the firm itself. Every firm of solicitors is obliged to have a formal complaints procedure, so ask them for a copy of their complaints prodecure - then follow the procedure set out (there's probably a named individual in the firm who has been allocated to deal with complaints.
If, 8 weeks after making your formal complaint to the firm, you feel that your complaint has not been resolved satisfactorily, you are then entitled to take your complaint to the Legal Ombudsman. But they require you to complain to the firm first, and will only take up your case 8 weeks later.
The Legal Ombudsman is independent and impartial. This means that when they receive complaints, they will look at the facts in each case and weigh-up both sides of the story. They are not consumer champions nor part of the legal profession, and they are also independent of Government. Their service is free to use.
Here's a very helpful leaflet on how to complain to your solicitors:-
Here's a template letter that you can use, if you like.
Here's a leaflet about the work of the Legal Ombudsman:-
The Legal Ombudsman will not charge you - their service is free.
I hope this helps and I wish you the best of luck.
Thanks and best wishes...