As to the first item: Set an appointment with the management company and bring all of your documentation. It may take then a week or so for their accounting department to go through their records. Assuming that the same management company has been in place during the last six years, the accounting department should be able to view your information against the association records.
Original article: https://www.reviewjournal.com/homes/homes-columns/barbara-holland/homeowner-has-long-list-of-hoa-complaints-2595134/