Need help with my pending unemployment

Right now, we're facing an uphill battle. I'd like to know if we have a fighting chance to win this case. We were given notice of unemployment on the 30th of November and in that agreement is such clause "SHOULD THERE BE NO AVAILABLE ACCOUNT OR POSITION FOR YOU, WE ARE HEREBY CONSTRAINED, MUCH TO OUR REGRET TO SEVER YOUR EMPLOYMENT WITH THE COMPANY “ effective 30 days from the receipt of this notice, or Dec.31,2017 in accordance with the law. ” In which case you  shall receive the FF: severance pay and incentive." This was on the 1st notice that they gave us but right now, they are trying to have us sign another agreement that will nullify said clause and they are forcing us to do so. Will this agreement hold valid if we don't sign/agree on the 2nd one?(2nd notice is completely different since it's notifying us that we will be under temporary lay off for 1 to 6 mos without pay.)  Badly need your advise.

tama sila. you are only entitled to separation pay if they cannot give you a job offer/position within 6 months. if kayo ang tumanggi sa offer parang nag resign kayo