Appointment that I did not need

I received a letter informing me I had an appointment booked in Newmarket this weekend for my booster however I already had my booster the Sunday just gone in my home town of Bury St Edmunds. Why was an appointment made for me after I had already made an appointment myself that I then had to waste time cancelling! Feels like lack of communication among services.

Incidentally, my experience of getting my booster at Chevington Close was fantastic and would highly recommend it