Banerjee revealed that the investors had met her on August 16, assuring that the matter would be sorted soon.
"So what happened that things changed so suddenly, what is the mystery behind it?" she asked.
"East Bengal have a great legacy. We all want Mohun Bagan and East Bengal to play in ISL. I am very happy that Mohun Bagan are playing and we all want East Bengal to play in the ISL too.
"We will also let them know that we are displeased with the situation and we will try to sort this out. Time is very short, let's see. I urge everyone in the club management to come forward and deal with the crisis," she added.
East Bengal top executive official Nitu Sarkar however said they are yet to receive the letter of disassociation from SCL.
"We are yet to receive the letter, so can not comment at this point of time. But we are hopeful to play ISL," Sarkar told PTI.
The club management had signed an initial term sheet in September last year as the porting rights as well all its assets and properties (including intellectual) were reportedly transferred to the newly formed joint venture "SC East Bengal".
It had paved their dramatic entry into ISL last season where the Robbie Fowler-coached side had a pathetic ninth place finish with nine losses, eight draws and just three wins.
But trouble brewed in the build up to the upcoming season as the HM Bangur-owned SCL refused to "spend a penny" on team-building unless the final agreement was signed.
East Bengal club executive committee had decided not to sign the final agreement claiming discrepancies in the initial term.
Shree Cement had already sent a revised version of the final agreement to the club as well as to the West Bengal Chief Minister on August 16.
But the club management upon legal consultation remained adamant and SCL decided to end the deal.