Help Needed: Facebook Marketplace Access Restoration

I've encountered issues with my Facebook account, particularly with posting on the Marketplace. I need a seasoned social media specialist to assist in regaining access and also studying the possibility of a Facebook shadow ban of my professional page (that doesn't grow at all).

Key Requirements:
- Expertise in resolving Facebook account issues
- Proven track record with Facebook Marketplace
- Skills in social media management
- Ability to devise creative solutions
- Strong understanding of Facebook's policies and procedures

I have already appealed to Facebook Support without any meaningful feedback, hence I require professional assistance.