I made a complaint on 4th January. In that complaint I stated that they must NOT call me because I am working from home & that I'd prefer an emailed response. Today I received a letter which stated "we tried to call you about your complaint". It went on to say the complaint was resolved but addressed a minor issue that I had to mention to put the complaint in context - they did not address nor resolve the complaint itself. Absolutely useless.
FYI -I am posting here to make others aware of how poor the service is - not to try an resolve the issue in DMs because that is what led to my complaint!