Call back later. He has a perfect right not to answer, and he may be busy. Relax. Life isn't a tragedy.
Assuming youre asking "what are those people called that put your back into place" the answer is chiropractors, osteopaths, cranio-sacral therapists.
It means he wasn't able to come to the phone when you called. Relax.
You call them stockgrowers or ranchers.
interviewers
Those people are called buskers.
you call tbese people doormen or doorman
People from Thailand are called Thai.
Botanists.
shelfish
Some people call it "sway back."
Those English speaking Britains call it Christmas.