Thanks for the additional details, @Anonymous.

For your first concern, you'll have to contact our QuickBooks Desktop (QBDT) Support Team so they can verify your account and if  it's possible to have a QBDT free trial again. They also have the tools to check your email address and perform a password reset for you. This way, you can have access to your account again. Please refer to this article on how to contact them: Contact QBDT support.

Also, yes, you're correct that QuickBooks doesn't allow you to re-import web connect files to ensure there aren't any duplicate entries. Thus, if QuickBooks recognizes a duplicate one, it will be ignored the same with your case. I can suggest a few solutions you can consider performing. 

First, you may restore a backup you created before you imported the web connect file containing the missing transactions. When done, you can import the web connect file again. Second, you may just enter them manually in your bank register if there are only a few transactions for the period.

Here's a great Community resource to check out for more info about fixing web connect file issues. It can also be an awesome site for other QuickBooks concerns such as managing payments, income, and expenses, running reports, etc. to keep track of your business: Community help articles.

Please let me know if you have more questions. I'll be here to assist you. Take care and stay safe.