When a federal criminal defendant's retained counsel has abandoned him, does a court abuse its discretion by prohibiting the defendant from discharging retained counsel to avoid a trial continuance?

QUESTIONS PRESENTED FOR REVIEW 1. When indisputable evidence shows a federal criminal defendant’s retained counsel has abandoned him at a key pretrial hearing and is not prepared for trial, does a court abuse its discretion and deprive the defendant of his Sixth Amendment rights when, for the sole purpose of avoiding continuance of a trial, it prohibits him from discharging retained counsel? i