Are you the owner of the property?
If not, you should contact the owner.
If you live in an apartment/flat, contact the Managing Agent or Housing Association as they may be responsible for carrying out repairs.
If you live in a shared ownership property, you will need to contact the Housing Association as they may have a responsibility to carry out repairs.
Check if there are any Insurance Backed Guarantees or other Warranties that may be in place and applicable to the problems with your property.
If there are, you should contact the provider of the policy to make a claim under that insurance policy.