Challenging High Court Single Bench Judgement On Writ Petition

Were can I challenge High court Single bench Order. The order was passed on a Writ Petition. 1) Should I appeal to a division bench of High Court or 2) Should I appraoch Supreme Court. The company had challenged a Interlocutary Order of lower court in HC. In high court, Hon'ble Judge had offered a middle way to both parties subject to a undertaking from company Lawyer on certain issues. Company lawyer verbally agreed on giving the undertaking in court. My Lawyer agreed too, accordingly the The Hon'ble Judge passed the order. Now in lower court the company is mentioning something else. The HC order received does not mention regarding any Undertaking. My lawyer says usually HC undertaking does not need to be written (is it true.... verbal undertaking is a norm in HC). what action should I take...... can I sue company but I don't have proof........ even if i have proof what punishment can company get for providing false undertaking to HC.... or Should I challenge the Order.