Welcome to our community!
I'm sad to read about your experience since you started with us. It's really not what we want for you and we'd hate to see you leave because of this! If something was wrong with your invoice, it definitely shouldn't take this long to fix.
Did your new bill come out, was everything sorted out on the new bill? If not and you still need help with this, you can reach out to us through one of these channels for account related inquiries or we can send you a private message here on the community.
Let us know what you prefer.