Non Approved Charge Added Surreptitiously

My voucher was for $142.65. I declined all extra insurance, gas, etc. When I was handed my bill, it came to $187.79. This is because Value adds, without asking permission, a fee for "RSA" of $3.99 per day. "RSA" apparently is "road side assistance." I immediately told the desk person I did not approve that. She said it was too late to remove this unapproved charge, and I should call their office. This is the second time they have done this to me. This is outright theft. Also, I was told when I returned the car that I would be emailed my final bill, and I wasn't.