Retailer told me I would get the 50GB for $99.99 for 24 months

Here's an update to my problem. Apparently my initial installation was not done correctly and my equipment was not properly reporting my bandwidth usage so I was misled into thinking I would only need 20GB and changed my plan.

 Not long after they sent a tech out on a service call and fixed the "problem", which I wasn't aware I had until it was fixed.

Then it began reporting correctly and I monitored my usage for awhile, prorated it out and decided I would need closer to 50GB so I changed back.

 Because of a faulty install/equipt, whatever, I am now off the $99 special and on the regular $129.99 price.

I don't feel I should have to pay more due to something that was out of my control.