How to lose your customer's trust in 90 days

I recently got a prepaid cell phone for school. There are only 3-4 people who have the number, and I have made a total of 3 phone calls, all under 1 minute. On top of that, I've been out of the country for most of May, which means the phone wasn't even turned on. So, imagine my surprise when I got an email from Telus telling me that they had examined my phone use and thought I would save money by switching to a monthly plan. I think if they had actually looked at my records, they would have sent an email telling me I would save money if I switched to using pay phones!