I really feel for you, you've been through such trauma very recently. And now it's super difficult to watch the baby beardie's health decline, my heart goes out to you.
I can also assure you that I never push people to vets, as a matter of fact look at the current threads where I have tried to help people many times by advising good home care instead when they , the owners themselves, are making appointments for things that can be handled without a vet. I agree that the first thing would have been a good uvb set up, not injections of any sort. Maybe someone else here or another forum suggested vets or injections. It's true that some babies born with a kink in the spine will decline and never recover, but that's not always the case, some do well. But I'm not here to judge you at all, just to offer support and help. BTW, can you post a close up to show the baby's condition ?