I understand you wont like your nice Signature campaign to turn out to be a horrible service customer support wise, but 3 days and no sign of customer support isnt a good look for a new service trying to win new customers.
It's none of my business how fast they handle their support cases to be completely honest with you.
As I said before, I understand your frustration though.
1. i didnt save the note key
2. I'm not sure what the note public address is, but i should have it
3. I saved the letter of Guarantee
4. I remember the exact donation percentage
5. I cant sign a message from the deposit address cos its a privacy coinjoin wallet that bounces funds to a different wallets before sending out, But maybe the will be a way to do the signing??
As o_e_l_e_o pointed out, by saving the letter of guarantee, it is very likely that they will be able to help you in this case.
It's is very beneficial that you saved all of this information and that you reached out to the support and on the forum immediately.
I guess this is just an unlucky situation that @whirlwindmoney is absent currently.