I'm also here to recommend Dainaird's new book on flipping.

-------------------------------------------------------------------------------------------------------Recommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?

It's common practice in Europe, Canada, Australia but almost unheard of here in the US.

Recommend having an attorney review it to confirm.If the PMA has legally expired, then the PMC is in the wrong - although they may still have claims for covering the legal expenses.

My recommendation is to have someone put in excel and show you the actual numbers.

Can anyone recommend good companies to root cause  and implement solution to fix this issue?

I would recommend to read a few books.

For a first time investor, I definitely recommend house hacking for most people as homeowner loans are by far the best in terms of rate and LTV. 

@Adam BartomeoAny recommendations for the collection agency?

Also recommended getting a home inspection.