Legal Question in Consumer Law in Wisconsin

No, business contracts generally are not totally voided due to one mistake. Rather, courts enforcing iit would usually attempt to reform the remaining parts to make the rest of the contract sensible, There are exceptions to every rule, however., particularly in consumer protection matters, where a unique set of rules apply.

Do not assume that I am your attorney because of my response here, since I would not normally be taking any further action on your case. You can request further clarifications on AVVO or see my past answers here which might help you at http://www.avvo.com/attorneys/53401-wi-jay-nixon-1529181/answers.html?sort=recency , or at http://www.lawguru.com/answers/search/attorney/jknixon.