Bridge gap, fit issues: guidance needed.

Dear Esteemed Dentists, I need guidance on a new 6-unit bridge (cemented 25 days ago by a prosthodontist) with fit issues noticed within 5 days. Abutments are healthy canines and RRT lateral incisors with posts. Issues:  Palpable gap (fingertip fits) on the left canine lingual side, sometimes trapping food. left Canine crown feels bulky, causing constant soft tissue irritation. Sharp Margin: Left lateral incisor margin caused chronic gum irritation after smoothing attempts. Dentist’s Responses: Claims gap is an intentional "cleansing gap." Proposed solutions: gum massage gel for 48 days or sealing with bonding material. Suggested a CBCT scan. Second Opinion: Confirmed poor fit/technical error. Questions: Are these gaps clinically acceptable? Are proposed solutions (gel, bonding) standard ethical treatments? What are the long-term risks to abutment teeth? What is the standard  of care for rectification? I seek guidance on an ethical path to ensure my dental health. Thank you.