You said that you did not know what Managed Payments was, did you sign up to 'something' and were you verified to sell when you did?

And again, PayPal has not been an option for sellers to be paid in years

You are not up the creek without a paddle at all , and there is something you can do

Make sure you are signed up to Managed Payments and the details are current and correct

And then wait the 30 hold which will happen regardless as you are a 'new' seller (it does not matter how much you sold years ago)

As per the information and links other members have already given you to try to help you

We cannot do anything more than give you accurate information and links to said policies/information/how to