No response from RCS

I contacted RCS from their contact form on their website on Monday regarding banking details I want from them to make a payment on my loan. I got an email from them on Wednesday saying they want my ID number or account number so that they can access my account. I have send them my ID number immediatly and up until now haven't got any feedback from them. I have forwarded the email again about two times with no response. Can someone please get in touch with me with the banking details and what I must use as reference. Thanks.