Airbnb extremely poor communication service

I made a booking a few months ago. The Sunday prior to our booking our president announced that all cross provincial flights were prohibited. I sent the Airbnb host a message that can we get a refund or move our dates since well we won’t be able to fly to Cape Town due to the new Covid regulations announced. He said he won’t be able to give us a refund but will give us he freedom of moving dates as much as we can. A day prior to the date that it said we should be checking in I sent him a message making him aware that we won’t be coming and he must please not process that date since we had an agreement. Since today he hasn’t responded and now I’m receiving emails saying I must rate my stay whereby I never even made it to the Airbnb.