patient abandonment

I received today a registered letter from my GP doctor in which she cancelled my upcoming follow-up appt. and stated I was no longer under her care as she felt I was unsatisfied with her service. The practice did NOT provide an alternative GP. I also have an upcoming specialist Dr. appt ( as per my GP referral), in which will have NO GP doctor to review any further findings, due to her 'abandonment' - is this considered medical malpractice? (Also, this GP's office staff has made many errors in test orders, shown to be inattentive and indifferent to ongoing health issues, scheduling and medical care.)