"Disappointed "

I received two letters in the same envelope 1 cancelling a up coming appointment the other giving me a new date. I had a text confirming the new appointment the day before. It was by telephone. I was ready and waiting for over an hour no phone call came. When I rang the next day to see what had happened I was told it had been cancelled . The lady I spoke to told me it had be logged as an unanswered call this is untrue as I was waiting for over an hour for the call to come through. I was told not to worry as they would send me a new appointment. The issue I have is that they canceled the call and blamed me . I do not want my record to say I was not available when I was waiting.