Wow, something is really wrong there.
I have Verizon, with a small 1GB plan that I never come close to using up (average .30GB) because it is set to hook up to my internet when home.
I pay a total of $68.80 a month (1 phone), of which $5.04 is service/taxes;
$0.70 - Fed Universal Service Charge
$0.21 - Regulatory Charge
$1.23 - Admin Charge
$0.40 - FL State 911 Fee
$1.89 - FL Communications Service Tax
$0.61 - Sumter County Comm Srvc Tax
My billing address is 'The Villages,' but I can't imagine your county tax is $10 even if it says 'Lady Lake' and 'Lake County.'
Good luck in figuring out how and why you're getting shafted.