Poor service

Hi so I'm currently staying in a flat that is managed by this agency and last month I lost my job and communicated that I'm not able to pay rent but will be out by month end and I asked that because they owe me a deposit which is equal to rent can they please use my deposit as rental as I'm serving notice therefore there won't be a need to pay me my deposit and Michelle refused and right now they saying threatening to hand me over and I communicated that I'm still waiting for my payments