Ask an Property Solicitor. Get an Answer ASAP.
Unfortunately without further information I will have to provide a general answer.My first piece of advice would be to resolve any issues informally, this usually involves following some form of complaints procedure rather than automatically proceeding down the legal route.
If this does not provide an adequate outcome then depending on the matter you should then contact a solicitor with specialist knowledge in that area. Please see the following link:
You should select the legal issue from the drop down and include the postcode. A list of solicitors will be generated by proximity to the postcode. As with all professionals it is worth contacting several firms to see which firm can provide the best value for money.