Dom's top tips of the art of complaining included:
1. Avoid wasting time ringing call centres and instead write to complain. Find out the department in the company responsible for dealing with customer satisfaction, even a named person if you can, and go direct with your complaint.
2. Remember to make a note of all communication including dates and times of a phone discussion and the name of the person you spoke to. This is important if the case ends up going to court.
3. Always make a complaint in writing, keep it civil and try not to get upset and throw insults, important to remember if you do speak on the phone. If you do begin shouting and swearing the phone operator is within their rights to hang up on you.