Clinic forgot I had an IUD

UPDATE: They sent me a portal message saying to stop my birth control pills for 5 days and then they will reschedule the saline ultrasound. The previous plan was to transfer in October, but that's looking unlikely now, right?

I was supposed to have a saline ultrasound this morning to start the transfer protocol, but they forgot I had an IUD (we are doing IVF for genetic reasons). I had told them previously and even asked if I needed to have it removed before starting any of the IVF process and they said no.

They removed it at the appointment but couldn't do the ultrasound (it would be "abnormal" due to the removal). Everyone seemed flustered. They told me it would cause a delay, but they couldn't tell me how much of a delay.

Has anyone else dealt with this? Am I looking at a significant delay in our cycle?

I'm also pretty upset they forgot about this. I get mistakes happen, but I do think they should be trying to make this right for us. Is there anything I should be pushing them on?