REQUEST FOR ADVICE

Over the Christmas season, I received several packages from Amazon which I didn't order and 'appear' to be gifts from frens.  No card or paperwork was included and when I contacted Amazon they refused to disclose the names of the senders.
They were nice gifts and I feel terrible at not being able to acknowledge and properly thank the senders.  It's quite possible that they had requested that Amazon include a gift card, but Amazon failed to do so.
I seek advice on how to proceed so as not to insult anyone by failing to thank them. 
I also don't want to insult those who didn't send me a gift by pointing out the fact that they didn't send a gift.  I don't want to make them feel guilty.  Christmas is about Love, Jesus and Faith, not necessarily about 'things'.
 
As I see it, my options are: 
1. Send out a generic mass mailing to everyone on the planet that I know, asking them to please contact me if they are the senders.
2.  Do nothing in the hopes that the senders might contact me and mention the matter, while running the risk that the sender will feel insulted by my failure to thank them.
3.  Do something else that this scruffy stoat has failed to consider.  
THANK YOU for your time and consideration! ❤️