"Receptionist refused to give me a booking"

The visit to the GP at Beversbrook went well. However, on leaving, I was asked to arrange an appointment with reception for another blood test for comparison. The receptionist refused to give me a booking stating that  no nurses were available. I said it could be done in the near future at which they replied that they told me, no nurses were available. I asked if they could let me know about a blood test in the near future and they just looked at me so I left. I’m now in limbo.. I don’t know when or if  I will have another blood test arranged or whether I should go to the Patford House surgery and arrange one myself.