Concert Producers to Sue Nora?

There is an alleged report that the Superstar, Nora Aunor can face a law suit for failing to carry out a promise or commitment to perform in a show.

This is in relation to the alleged plan of the Vancouver concert producers to sue the superstar.

Nora got a big amount for an advanced payment. Nora did not return the amount she got, as part of her fee.

Nora explained and asked the concert producers to just wait until she can regain her singing voice.

But how far can the the said producers wait. Can they wait all the time?