"Terrible experience "

I range the day before to book in for a blood test and was told i am booked in for the following day at 9:45. I even received a text message to confirm this! So i cancelled 2 meetings at work, 1 of which is with important clients because health comes first. I went in the cold and wet weather to the medical practice to be told you don’t have an appointment today its next week. I was made to feel it was my own fault for coming on the wrong day. When i showed my text the receptionist said my colleague sent it in error. No apology or anything. I think this is disgusting i have taken time out to come and changed meetings just to be told its the wrong date. They made a mistake but were very washy about it. I just walked away from the situation in the end. I question if next week my appointment will be the real thing or will i be told again its the wrong day!