struggling getting a job, I don't know what to write to them in a message cus when they called me I couldn’t speak from blockades completely

struggling getting a job, I don't know what to write to them in a message cus when they called me I couldn’t speak from blockades completely I applied for a job online a few weeks ago and now they call me on the phone and they told me, are you the person who applied? I was calm but I couldn't say yes i lost my voice and i hung up, I don't know if it's good to send a message to them I don't even know what to write to them, i really need a job idk what to do