Recover Instagram Account Access

I manage an Instagram profile for a client, but the registered email and phone number are no longer active, so we can’t complete the standard password-reset flow. I have already walked through Instagram’s own account-recovery prompts, yet access is still locked... (Budget: ₹750 - ₹1250 INR, Jobs: Account Management, Brand Management, Community Management, Customer Support, Digital Marketing, Instagram Marketing, Social Media Management, Technical Support)