You can do that very easily by going here:
https://unifyd.tv/account/purchases -> Cancel Membership.
As far as I know they will AUTOMATICALLY refund the remaining balance for the rest of the membership period.
These guys seem pretty decent to me, I suppose no need to shout in all CAPS. If you email, it might take a while as they are probably short on staff, but cancelation is all in your hands, and it happens immediately.
Commented on Understanding The Pyramid Code in Hebrew
30 Oct 23:39
This is wonderful, I will put up something on github sometime over the weekend, and we can take it from there.
Thank you Tonya Claybaugh . This gives me motivation to get things done.