Chastity and orgasm denial discussion

Hi everyone I have wanted to be locked up in a chastity device a long time now, and finally I acquired the CB6000s. The hard plastic and short length appealed to me. However, wearing it has made clear two problems:

1. Pain: While I expected some pain and discomfort for my penis when it would try to get hard, I did not expect the almost constant pain at my balls. Specifically, the device gnaws something terrible at the underside (or should I say root) of my balls. This pain is really too much to bear. Especially at night but also during the rest of the day. Increasing the size of the ring helps somewhat, but the pain does not go away.
2. Security: I expected the device to be more secure. Because of the pain, I usually wear the middle-sized ring. But getting out is really easy and I have also slipped out by accident on several occasions. Decreasing the size ring makes it more secure (though not completely), but also increases the pain. I am already troubled enough by pain when wearing the middle-sized ring. Security may also be related to a third problem: (3. Appearance and anatomy: When putting the device on, I can make a tight fit. But after my penis has swollen and reduced and changed size a few times, I find that my device hangs really low on my penis, with the lower half sticking out. This is what makes it very easy to slip out. It also looks weird. What should I do? Please help! If not for the pain, I love being in chastity.