Good to see this clarified. Owners who threaten legal action on the Management Company often don't realise that themselves and their neighbours are members of this company. I think you need to address the issues directly with the 3rd party contractor in the first instance/I cannot answer your query, but as a Director of a management company I’d just ask you to keep in-mind that the management company is ‘owned’ by you as a member; it’s your and your neighbour’s company. The Directors are likely to be neighbours of yours and working free of charge for your benefits (unless you’ve outsourced that).
Looking for anyone who can identify what needs to happen next as all non legal avenues have failed.