Blimey how do you cope with the stress!
It's the level of incompetency I can't believe. Lost paperwork, no records of visits.... and not even apologising for it all! Typical council mentality. If I did this kind fo thing at work I'd be on a written warning.
Have a single-storey extension built to create a new kitchen/dining room area. Used an architect to draft plans and designed with folding-sliding doors on the back (which look stunning but should do after the money I spent on them!).
Submitted a Building Notice rather than Full Plans...