Bitrix24 CRM and call center software configuration

[login to view URL] is a free CRM product with telephony abilities. I need someone to help me set mine up. However, I need them do it first and allow me to call on their behalf as if I were the employee making the calls. After that is accomplished, and it is clear that they can set it up, then I want them to help me set mine up. However, they have to do it first with their own account.