I've not received the coupon. Just like the last time.

Did you open the email that matches the purchase email?
maybe it went to spam.
although one of the purchases I did in the past . I did not get the coupon and had to request it.
I was not subscribed to marketing e-mails, that's why it didn't come automatically, I was told.
Finally received the code from support via e-mail. But it isn't working still:
discount code isn’t available to you right now
I am using e-mail address where all my purchases are. E-mailed support, awaiting resolution.
Yea in order to get the codes you must have not deselected the receive marking emails during checkout on your last order, if you did you wont receive the code and code probably wont work with our system.
Checking with the team for resolution on this.
All the platforms we use are annoying even when customers have not explicitly opted out from emails. Will see if we can set something up manual for our rewards programs for existing customers.