For what it's worth I donated 3 euros for this and I got the content very quickly. A few days after that, I donated another 3 just because I thought it was worth it but he didn't know I would do that so 3€ was enough and believe me, the mod is worth much more than that.
I don't know how much you gave but unless it was something ridiculous or one of those petty 0.1 donations I think you'll be fine.
Haha, you don't really think I donate 10 cents and then complain about not getting the VIP package?
Initially I donated 4 Pounds, but this was even before I tried the free version, because I just donate a few quid if the mod looks promising - and more afterwards, if I'm satisfied with the outcome.