In the first instance, we would advise that you approach your neighbour directly in an attempt to resolve the situation. They may not be aware that it is happening. You should always ensure that any contact does not escalate the situation. If you have already tried this, the noise could amount to noise nuisance so, you should contact your local authority who will have a specific department to deal with such issues.
Unless there is any evidence of the dog being mistreated then the RSPCA will not be able to help. If you do believe that the dog is being mistreated, you can contact the RSPCA.
