Kodoo is cheating customer. I have not used my phone for a month and they are charging over $5 for data for $20 voice only plan. When I was using the phone it was always charging over $10 even I was them to turn off the data service. It is ridiculous.
Adding to what Sophia said, if you've been experiencing this for a while you should have contacted Koodo earlier. You can request a data block so it will be completely disabled but if you have a 3G HSPA phone then picture messaging won't work anymore.