verizon wireless security deposit Internet

 I did an online order for 2 cell phones through verizon wireless, I picked my phones, my plan etc. When I got the the "complete order" screen, the total that was going to be charged on my credit card totaled $579.13. I did approve this amount to be charged. When I received the confirmation email from Verizon, it indicated that the total to be billed to my credit card is $1379.13. They charged me two $400.00 security deposits without informing me at all. I was able to cancel this order eventually, but what a waste of time. When I called to confirm the cancellation, I tried to let them know that I thought it was lame that they charged me an extra $800.00 and they said I should have know they do a credit check. That is fine too-but how can they just add that without first informing me of the amount and getting my approval for a different amount?

 Look, I understand the concept of a security deposit, but, $800.00??? Without any sort of warning that it could even be close to that? $800.00 is more than my rent for a month. In addition, I have no idea why I would be charged this anyway- I have had verizon fios for YEARS and they have always been paid on time. I also have a car note, a credit card etc. all paid on time way before the due date. My fios contract ends in 10 days and I think I might get rid of all Verizon products at this point. I would have never approved this if I had any idea it could be close to that much. They claim I will not be charged a cancel fee, but if I am I plan to contact the CC company and dispute. BUYER BEWARE!