People here are generally just community members trying to do what they can to help. But it sounds like you need to work with your hosting provider. It's unlikely that anyone here can do much to help you. If you can get more details on what's going wrong (like the exact error message that Let's Encrypt is returning), then people here might be able to help you understand what it means. Even then, if it's due to the domain actually exceeding the rate limits, there's probably wouldn't be much that anyone here can do. You need to talk to the owner of that cprapid.com name (they might need to submit a rate limit increase request, depending on what rate limit is being hit), and/or your hosting provider.
There are some paid consultants who support Let's Encrypt, and you might be able to engage with one of them to help you if you feel you're over your head. And it's possible that someone here would be willing to give you free support over PM, but most volunteers here prefer to just help in the public forum area.