I tried for 6 months to reset my Frontier Airlines password, I contacted their support line about it. They told me to do a password reset, so I did and it said my account was locked. So the support person said "Sorry it is locked, I can't help now, try again tomorrow but contact us before you do the reset"
So I did. Waited 2 days just to make sure 24 hours had passed, contacted support, told them about the problem, they told me to do the password reset. So I did the password reset, account locked again. Their response "Sorry your account is locked, contact us again in 24 hours about this.
So I did. Waited 2 days just to make sure 24 hours had passed. Contact support, had them verify the account is current NOT locked. Which it wasn't, so they told me to do the password reset, account is locked. Their response "Sorry your account is now locked, contact us again in 24 hours."
Eventually I did realize what the problem was, which is kind of my fault, but the fact my 4 attempts to contact their support directly about this problem didn't trigger some kind of "Maybe this is an issue I could bring up to the dev team" is kind of surprising. The issue is that if you try to reset your Frontier Airlines password with a password that is too long, say 20 characters instead of 16 (max), it just locks your account. No errors given on "sorry this doesn't meet our requirements" just locked. CS tried nothing to look into it, just it says locked now, not our problem.