Hi @samanthakoon & welcome to the Community!
While it's not possible to reduce the charge of your long distance calling if the usage is valid, you can reduce future long distance charges by adding our $7 value pack which comes with:
- Premium Voicemail-To-Text
- Unlimited text/picture/video msgs from Canada to U.S. & international cells
- U.S. & international premium calling rate
- Name display
- WhoCalled
- 2500 call forwarding minutes
You can check out the premium long-distance rates for each country here.
Hope this helps. 
