Sponsor demanding more money to allow company closure

My brother has a contracting company (LLC) made in 2014. Now he doesn't have money and wants to cancel the company.

The local sponsor is a girl (whom my brother never met) dealing on behalf of her husband, he is from Pakistan. As per the MOA, the sponsor is eligible to take sponsorship only for one year (2014).

He forcefully took money from my brother for 2015 & 2016 which is not due and requested my brother to issue one visa for his cousin.

But later on, my brother knew that he sold the visa for 15k & he again asked him to issue another visa but my brother refused. Since then, that person is making drama, mental torture & ruin his company.

He didn't give a labour card to my brother for an employee to make him an absconder & get cancelled. He even called the employee to make a court case against the company.

Now, we called him to come to sign on cancelling the company but he is illegally asking for the remaining years of sponsorship.

My brother told him he inquired at the economic dept. and the local is eligible only for one-year sponsorship which is already taken & the money of sold visa will adjust the 15k.