Cancel booking

Good morning, 

I have a guest who should be at my caravan now. I contacted him some weeks ago to let him know if the situation with the park closing, no reply. I contacted him again 2 weeks ago asking him to cancel the booking, no reply.

He contacted me to ask to cancel the booking on the arrival day. I replied that he would have to do it from his side. No reply. I’ve explained I’m happy for the booking to be cancelled but that he must do it from his side. He replied for me to go ahead last night! I’m not getting through! He should be there now so I don’t know how to deal with the situation.  a

Any guidance would be appreciated 

thanks