Did you have to send them your passport details and card details to verify it before you could recieve your essay?? Just wondering coz i have been asked to do so

I have made a payment to the company through paypal of £180 last night and I am am having serious doubts! I have never done anything like this before and the plan was to use the essay to base on writing my own. I could barely afford it but it seemed like a good idea at the time. The due date is in a few days but it says that verification is pending and I have contacted customer services about it and they want me to send my passport details and my card information through fax or scanned, "for verification" and then i will get my essay. I don't want to send my passport info. Why would that be needed tho if it was already paid for! Can anyone help me?? What should I do??

Thanks