I'm very sorry, but we can no longer reset Determined achievements for any reason. People have a variety of reasons that they miss check-ins on the wells, including internet being down, various life events getting in the way, or even getting injured or sick and being in the hospital, or just forgetting.
In order to be fair to everyone, we will never reset a Determined achievement unless it was due to a confirmable problem on our end where the Determined Wells are not working. If we reset it for one person, then we have to judge everyone's excuse and decide which ones are valid and which ones aren't, and we can't do that. So, in the interest of fairness, we have to say that we will never reset it for anyone.