No, unfortunately, you can not modify your reviews after is it sent.
However, you can make a request for your review to be modified, and you can do so by contacting the misterb&b team. Be sure to include the updated review.
Keep in mind that misterb&b will have the last say on your modification request, and our decision will be final.
If you haven't been able to find the desired help, you can always contact the misterb&b team.