I sent two support emails notifying numberFire of invalid data on their site. It was fixed within a few days, but they never bothered to even reply and acknowledge the heads up.
As I stated earlier, if you cancel a premium product on the 3rd day of the month, your access is immediately canceled and you will not receive a prorated refund. You cannot cancel via email even if the email you're sending from is the exact same email as your account. Cancellations must happen from the pricing page. That's OK. I get it. It's a safety thing and there are probably some automated processes behind the scene, but I'm guessing by the rude tone from the numberFire support person that I must have been the 100th person that day to ask. I apologize for not being aware of the previous 99 times that you had to answer that question.
It's completely possible that I simply caught the support person on a bad day, but my experience was not positive at any stage.