No, you are wrong. Anyone is able to express their opinion of your business. (also it is not clear that  your company is "legit", in fact this is far from true).

In order for something to be slander (or libel), it will need to be presented as a fact, not as an opinion. In other words, someone would need to say that your business is a scam, verses someone saying that they think your business is a scam. The statement that is presented as a fact will also need to be untrue.

As a general rule, people on these forums are not able to get a loan without collateral if they do not have existing substantial reputation. Your trust profile does not reflect any existing reputation and as a result I don't think you will be able to get your loan, in fact I am surprised that you were able to get the funding that you have received so far. It is also not uncommon for users to be labeled as a scammer if they ask for a no collateral loan without existing reputation.

Vod has given you numerous opportunities to legitimize your loan request by asking for evidence of the need for your loan, however you have evaded very question that he has presented to you. His questions (so far) do not even begin to break the surface as to what a smart lender would ask a potential borrower in your situation. Do you think a bank would just give you a loan with no questions asked after they verify your identity?

edit:
The above is the BB code for the link to your loan listing that you included in your OP. What kind of security company cannot even get a URL right