Turstpilot is just a scam. The way they operate is the next, they charge an annual fee to the companies which want to be advertised at their website. As soon as a customer want to give not a great review to one of "their" companies they will ask you for documentation like invoices (even if you provide them invoices through your email, still they will ask you for more info, even there's no more. But until then your review won't be published). Basically they charge companies a fee to only upload good and great reviews and delete the fair and bad ones, while they will make you waste your time.