Thanks for taking the time to reach out to us here, accounts423.
If you're experiencing one of the following situation:
you are unable to make an online payment
you have run into issues with the activation code or
the file hasn't been activated despite successful application of activation code.
I'd recommend reaching out to our Customer Care Team by sending an e-mail from https://contactus.intuit.com/en_IN/contact(click Subscription and Billing in section 2 and thereafter click Email in section 3).