[Stephen]

I used to work in CS and used to get a lot of calls from custs when they got their first bill as it was always higher than they were told it would be.

This is due to partical month charges. Your first bill always covers from when you were installed upto your bill date and then you actual month charge.

For example your install may take place on the 8th of the month and your bill date maybe the 27th. So your first bill has charges from the 8th till 28th and then the normal month in advance charges.

Check the bill and see what dates you are being charged for.