"No sedation for colonoscopy"

My mother recently attended for outpatient colonoscopy after a positive screening test. On arrival to the department my mother was met by the endoscopist and she explained she felt very anxious and would like to be sedated. She was cannulated and had something administered she assumed this was the sedation, soon after she was taken in for her test asked to lie on her side but did not feel any different. She told the attending nurse who asked her to stay calm, the endoscopist carried on with the procedure even with my mothers concerns heard! During the procedure she was in extreme pain and discomfort as the scope was advanced! She heard the endoscopist telling the nurse “she needs to relax she is too tense” trying not to cause a fuss my mother tried to remain still and allow the test to continue in great pain almost in tears! I find the lack of care and compassion is awful, the patient in this case my mother was not listened to, her pain was not managed and she was undersedated. She was told the test was normal, however if she was identified for future test similar to this she would not attend as a result of her experience even though it could be life saving.