I'm in a very awkward salary negotiation situation. I was sought and recruited for a position with a company by a friendly professional acquaintance. I interviewed for the job and was offered the position. They offered me $8k below my current salary. I said that it wasn't possible for me to accept their offer and thanked them after they informed me there wasn't any room for negotiation.
They came back with a $10k increase from their original offer. I asked for $4k more and was told that they would work on it and respond to me the following day. That was nearly two weeks ago. I followed up with a friendly email stating my interest in their company and position nine days after they said they would respond to me. No response to my follow up email from them.
How should I followup with them on this offer? They had great follow through up until my request for $4k more. Any insight would be helpful.