Cloudflare complaint: I can’t use the domain I bought

I’m having a very bad customer service experience with Cloudflare. Two days ago (14) I bought one domain .com with Cloudflare. It was a mistake as they don’t allow me to use the DNS servers I need to use. They don’t cancel the registration (so I can buy it again, from some honest registrar like Namecheap; they don’t refund the money (it seems that’s the only thing that matters to them). Anyway, they supposedly sell a registration of something I can’t control, since that I have to wait 60 days to be able to transfer the domain to some honest registrar, like Namecheap. It all seems kind of stupid to me. I paid for a domain that I cannot use with Cloudflare’s DNS servers. Cloudflare does not allow me to change DNS servers. And I have to wait 2 months to be able to transfer to another registrar.
I’ve already asked Cloudflare support to cancel the domain universitorium.com – this money is not important to me (that seems to be all that’s important to them). I can pay again. If they cancel this registration I can register the domain universitorium.com with Namecheap. The way they are acting, you are not allowing me to use the domain. This is not correct, after all I paid and I can’t use it.