We wish you could be a little more honest with yourself.
We've heard all the stories from the guide. Here is the guide's answer;
"I am so sorry to hear that you did not enjoy my tour. However, it will be highly appreciated if you could remember what you asked for during the night. It was Monday, but the temporary National Holiday, so I gave you a kind of heads-up like we would better skip the N-Tower to save a time because it must be very crowded and you must stand in a long queue, and instead, you were advised you could also see the lit Seoul night even from the next view points on the itinerary. Even so, you strongly urged me to bring you up to the N-Tower Cable deck (The Seoul City government banned any priviate cars including texi from going all the way up to the Tower a few years ago, due to eco-friendly policies.)
When we were in the long line to buy the Cable tickets for about 5 minutes, all of sudden, you have changed the initial plan which was to buy the round tickets, and you announced you would like to walk all the way up to the Tower on your own feet, and to return in one way Cable trip to the bottom.
More importanlty, I ensured you in a couple of times that, based on the contract, all the fees such as Cable tickets and the parking fee of N-Tower Cable deck would belong to customers. In particular, I stayed in the parking lot because I thought you would like to save your Ticket money when you told me to stay in the bottom. At that moment, I said "Please, text me at any time when you are in trouble." However, I have not had any contact from you until you returned to me, surprising me like "We are now walking down to the bottom" instead of returning via Cable Car after I texted you because I realized it was already too late to cover other venues.
Honestly, I really don't understand why you booked this guided tour program even when you were willing to do everying in your own way.
Hopefully, you will be better prepared for your next travel plan by studying more on the local stuffs if you do it in your own. Thank you anyway."