Contacting member

[n_y_r_09]

Was in negotiations with a seller. We both made several offers and counters etc, back and forth a few times. Last offer I made was declined. My page said I had one more try, so I was going to give in to the seller and offer what they countered me earlier. However, it won't let me submit the offer, just a rectangular box with a red exclamation point. So I went to contact seller and no matter which options I press, it says seller is not able to answer my question. My question is, how do I get in touch with the seller so I can complete this sale? Thank you.