Vrbo w/ affirm.

I move into my vrbo. Booked for 3 weeks for work. Few days in i discover bed bugs. Host not offering refund only nee unit. I go to new unit, nasty and just.. i gotta be comfy for work i keep thinking if its in one unit the building has it. But i would be SOL. What can i do?

I want to leave and just say screw it but i also want to dispute this with affirm. I have pics of bites, conversations my talks with vrbo everything. This is a literal health hazard. Is it hard to win a dispute with affirm? Has anyone gone through that process?