► To manage local businesses or request access to own:
https://support.google.com/business/troubleshooter/3452717

► To speak with a specialist:
https://support.google.com/business/contact/business_c2c_aw?hl=en

► For verification concerns:
https://support.google.com/business/contact/verification_code_issues

► More sources for business verification:
https://support.google.com/business/answer/7107242?hl=en

► Faster general issue support:
https://twitter.com/GoogleMyBiz
https://www.facebook.com/GoogleMyBusiness/

► General Help Contact Form:
https://support.google.com/business/contact/business_other_problem

► Business reinstatement for suspended businesses:
https://support.google.com/business/troubleshooter/2690129?hl=en

► File complaints against competitors:
https://support.google.com/business/contact/business_redressal_form