I think you may be confusing "eBay" with an inexperienced and somewhat uneducated "eBay agent".

Obviously, the help pages don't state that you need a contractual agreement and to ask other members about what is actually required.

Likewise, no experienced eBay agent who knew what they were doing would ever advise you to to ask other members for the information.

Therefore, it looks as though you've simply received zero helpful advice from an agent who has no idea about eBay policies or requirements.

From here you have one choice... you can either seek appropriate advice through the channels suggested in the replies here, or you can ignore same and risk having restrictions placed on your account.

How you proceed is entirely up to you.