Ordering NOW Internet generates error 'open order for this account'

Trying to move from Xfinity Internet to NOW Internet

Cancellation request placed on 6/20 to take effect 6/29.

From 6/30 thru 7/13, I have attempted to order NOW Internet - all attempts have FAILED.  Talked with several customer service representatives and learned that the cancellation did not take effect until 7/8.   Suggestions made include: wait, give it another day, server is down or messed up, to creating new account with different email address, phone number and credit card.  

I have waited and I have also tried creating a new accounts.   I also used different email addresses, phone numbers and credit cards.

The result is usually getting to the end of the service order form and clicking on the Submit button.  After several minutes of waiting the following message will be displayed:

Sorry we are unable to process your order at this time.  There is an open order for this account.

Occasionally,  rather than the above message, I will receive instead:

We are unable to process your request at this time.  Please try another payment method.

The customer service reps are unable to find any open orders that would be causing the error.  I am hoping that there is a supervisor / manager that has more visibility into the ordering system and can spot/correct the problem.

I can also tell you that many of these failed orders did not have any problem submitting a transaction to Mastercard.   I have several hundred dollars in $30 charges that I have already contacted Mastercard to inform them they are bogus and request they be removed from my accounts.

Some other effects noticed from this 'self service ordering portal':      

If you get the 1st error above, don't hit the back arrow on the browser as this will carry you back to the screen to enter/validate you phone number.  Unfortunately, when you enter your phone number and get the text with a new code and enter it,   the system will display error that the phone number does not match what is on record.

If you open a new browser window and log in to your newly created account, you will get a message about it taking a while followed by a message about Something unexpected happened ... followed by more text that flashes by so quick you can't read it.  The browser session is now hung in this loop and will repeat.