What a shame. You must feel very let down but, as others have said, your friends won’t have thought you were responsible for the quality of the flowers received through a third party,. I am sure they would have been horrified more by the cost! People have suggested plenty of lovely tips of what you may wish to do now but do complain and hopefully get a refund and then you can decide what to do to ease your pain and make you feel better about what has happened.
I received flowers from my son in Australia from one of the well known “arrive in a box” firms. I was so disappointed and complained to the firm. They did offer a refund back to the payee but I didn’t want to upset them so agreed to receive a replacement. It did come the next day (a Sunday) it was exactly the same flowers but far fresher and better quality specimens.
In the end I did tell my son, only to ensure that he did not see that firm again.
When I wanted to send flowers to Australia, I found a local florist there and emailed them to arrange a delivery, also asking them to ensure they were left in the shade in some water if no one was at home! I never heard back from the recipient, and ended up contacting the florist to ask if they’d actually been delivered! I was assured that they had personally handed them over to the recipient! I never did get thanked for them, which hurt at the time.
Take care