Unsmiling cabin crew

Recently I flew Mango on flight JE 249 3 Jan 2019. We sat on the runway for approx. 2 hours due to a re-fueling issue - we were told. The pilot kept us informed, was apologetic and professional. My issue was with the cabin staff. When one is overheating waiting to leave and they never offered so much as a complimentary bottle of water and smiling was not on their agenda. Very disappointing. Ok so I did not ask that polite service to be included in the air ticket price but really if I as a passenger managed to keep calm and not moan it would have been appreciated if when I asked for and paid for my coldrink one of the cabin staff smiled. Really Mango only reason I am posting this on HP is because I did not find anywhere on your site to post my comments.