@Tracy-Lynn0 If the guest was so concerned, she should have cancelled the booking or allowed you to replace the bed per the deliveryman’s schedule. You are probably looking at a full refund and a poor review from this guest. I would cancel the remainder of the booking and refund for the remaining nights. I would also categorize this guest as a scammer, intent on a free stay.
I had a bedbug scammer years ago. To prevent further claims and to reassure future guests, I posted in a nice frame the certificate from my exterminator stating that the property had been found bedbug free and had been further treated against all bugs. I kept this updated for several years.
On another note, I looked at your listing. Your wording implies a luxurious accommodation for 3, including an air mattress which is IMO not luxury. Luxury wording will attract a certain kind of guest, usually entitled and requiring constant attention. I would adjust my guest numbers and wording to attract the guest who is willing to pay your price for a delightful accommodation and who will not break the bank by demanding new furnishings and services. Best wishes for surviving the current guest.