Upgrade & Invoicing Nightmare

<p>After an *********** sales person did my contract upgrade (and I mean *********** because he did not know the products and captured the incorrect package) he then had to cancel it and reload the correct package, which now shows as 2 packages on my account that I get billed for every month. I queried this with the customer services department - they agreed to a credit "in good faith" because they disagreed with my query. The next month I get billed once again for 2 packages (with the "good faith" credit deducted) - can someone please look properly at my account and fix the entire billing, not just one item in the billing, is this so difficult to do??!!</p>