"my 2 half year old been took off the mri..."

my two and a half year old as been waiting since 10 months old for a MRI scan as he has GGD and cannot talk or walk and has the understanding of a 10 month old the first referral went missing in 2017 so in may his paediatric consultant sent a second referral letter which I have a copy of when ringing in June and august was told he was on the waiting list on all his development plans with the different services he's under they all have written awaiting mri results until today I rang to update the mri section my son has developed these absent seizures was I was told my son is no longer on the waiting list I'm fuming I was no notified when asked for valid reason cannot give me one I feel my son is being neglected by this service and will be making a complaint.