@Titanniki I took a look to specifically see how your account is currently running so I could try and help to clear this up for you. Right now you'll receive jobs that are a close fit for you in the "Jobs" tab of your account. You can then choose to send the customer a quote and will pay if they respond to you. The cost will always vary based on the details of the job, demand in your area, and how they respond. You can see what the cost of a contact will be before quoting by clicking on the "learn more" link below the customer's name.
I'm glad you reached out @Cutlass87. What you pay for at Thumbtack is the response you receive from a customer regarding the job. Once they respond, you get charged. Not to worry though, if their first response is a "no thanks" you won't be charged.
Are you getting charged for quotes you never received a response for? If so, I want to see what's going on and get you taken care of. Go ahead and send me a private message with the names of the customers and I'll take a look.
@Cutlass87 I took a look into the last receipt from your payments page. The four contacts on that receipt were all customers that you sent a quote to and then they responded. I'll send you a direct message with added details so that we can clear this up and discuss further.