Yessir. A smart haircut and a firm handshake will get you everywhere you need to go in life. You just walk right in that door, ask to fill out an application and demand to speak to Mr. General Electric. You tell them you're the man who is going to make his next great light bulb machine. /sarc
Whether you like it, or you don't like it, if you can actually find a phone number for a company, and that phone number actually eventually connects you to a human, nobody who answers it is going to know squat about job postings. Chances of you even finding an email address that gets answered by a human are minimal these days.
You're either going to talk to a salesman who wants to sell you something or a customer service rep who is willing to talk to you because you already bought something from them.
I suggest you try looking for a job elsewhere if that’s all the responses you’re getting.
The job of the customer service representative is to get you off the phone.