Here are a few things you can try:

1. Consider Changing Your Phone Plan – Take into consideration how often you used your phone line over the course of the month, and compare it to the terms of the plan you’re on. Did you actually engage in transactions that your phone system package could not cover? Do you foresee that this trend will continue? If your bill suggests that your needs are actually changing and your current plan cannot address those needs, contact your service provider so you can switch to a new plan.
2. Call the Customer Service Line of Your phone service provider ASAP – If you really have the best phone service ever, then you should also have the best telephone service provider ever, as well. This means that they have customer support that’s always there to address your concern. If there is a mistake in their billing, they can quickly make amendments to your bill. Just call them as soon as you notice the discrepancy.
3. Make Sure that You Know Your Options – The best way to get a good bargain is to know how to play your hand. This is especially effective if you are a valued customer of your service provider. Review different packages, and inquire after special promos. Talk to your phone company to see if they are willing to make tweaks to your phone plan. You can even look up competitor service providers to see if they have better deals, or to use as leverage in your negotiation process.

Having great telephone service is only half the battle. In order to win the war, you need the best telephone price deal you can get.