Double lease

we have a lease with Prosperity energy for drilling rights. they have not drilled yet but finally came through with some investors.. Halliburton called and wanted to lease the acres. we told them we already had a lease. meanwhile, one of the surface owners leased with halliburton while having active lease with prosperity. what a mess.. prosperity spoke with her and told her that was not legal. guess she spent the bonus money from halliburton because she would not get back to prosperity. they even offered to repay halliburton for her! anyway, now they cannot reach her.. they said they may have to take legal action. I think halliburton should get with her and make things right because all of this is holding up any drilling planned.. does anyone have experience with something like this?