HUD rental support program doesn't want to pay for tenant overstaying lease. Advice?

[Jin Lee]

I'll try to keep this somewhat vague for the tenants privacy.

I have a tenant who is provided longterm full housing support through a charity affiliated with HUD, they send me a check for her rent every month like clockwork. Last month she decided she wanted to move and asked to end her 12 month lease early, which I agreed to.

Her caseworkers confirmed with me that they would ensure she is out of the house by the 1st of March but she has had trouble getting a truck to move her stuff. I've explained to this charity program that she is still living there and offered to charge a daily rate (rent divided by days in month) until she is out, but they are refusing to pay anything. They claim they can't because they are already paying for her new apartment. It is now a week into March and counting I'm not really sure where to go from here.