"Booking being cancelled repeatedly for no reason"

I went to make a doctor appointment at the GP and the receptionist confirmed me that I have been booked in at end of November 2024. However, when I attended the GP, the same receptionist told me that she could not see my appointment record and the relevant time slot was indeed occupied by someone else. She knew that she made a mistake and asked the doctor if she could see me immediately. This is the first incident.

The same thing happened yesterday. This time I received text message on 4 February 2025 confirming me the smear test appointment on 5 February 2025. When I attended the GP, I could not checked in by using the screen (I noted that some other patients also had the same problem). Hence, I proceeded to check in at the reception counter. The lady told me my appointment had been cancelled for no reason. I told her that I received a confirmation by text message on 4 February 2025. Another colleague of her then came out trying to help and confirmed me that everything was fixed now and I could go to first floor to wait for my turn. I had arrived at the GP at about 8:45 am for my appointment at 9:20am. However, no one called my name until 9:20 am. At that time I thought the cytology nurse may be with someone so she needed more time. At 9:45 am, I went to the reception and reported to them of the same. However, I was then told that I was the one at fault as I did not attend the appointment. I told her that (the same receptionist) she was the one who checked me in and asked me to wait at the first floor. I had been waiting for more than an hour since I arrived at 8:45 am. Some other receptionists then came out and told me that the cytology nurse was fully booked today as I was late and asked me to rebook!!! I insisted that I had been waiting after they checked me in at the reception for more than an hour!!! Finally they asked me if I would take up 11:20am time slot on the same date. They said if I refused, I just left the GP and rebooked!!! I asked if they could check with the cytology nurse to see if I could be seen earlier but the answer was negative. So I had to wait there for another 1.5 hours to see the cytology nurse. When I saw the cytology nurse she said I did not attend 9:20 am appointment so they needed to rebook me (probably she heard one side of story from the receptionist(s)). I feel deeply wronged by the GP's staff's wrongful accusations on me as a patient and I felt so stress off to handle the impolite treatments by them. The GP should disclose the CCTV to verify who's telling a lie.