Mark McDonald has criticised the transport giant for announcing the X40 and 11 lines in Kingswells will cease to run due to low passenger numbers. The Aberdeen Donside MSP previously welcomed the decision to hold public meetings in the community to engage with people about the then proposed plans for cancellation.
2,200 people had signed a petition to First Bus bosses urging them not to scrap services which many people rely on to get to hospitals in Aberdeen.
Following calls from Mr McDonald the council were to hold two public drop-in sessions in the coming weeks to discuss the matter.
Mark McDonald said: "The behaviour from First Bus is utterly disgraceful. Announcing this decision prior to speaking to members of the public and hearing their views on the proposed changes makes a mockery of the consultation process and reveals that they are not committed to the conversation they claimed to be just weeks ago.
"People in Kingswells who are reliant on bus services will now be extremely worried about how they are suppose to get across the North East and whether there are any viable alternatives. This should have been a time for consideration of any and all opportunities available, but it seems First has prioritised its own interests ahead of customer service and are set to leave many people in the lurch.
“The clear opinion being expressed by the people in the community is that First should not be abandoning them. To not allow residents discuss and explore alternatives with the company before a decision is made shows absolutely no respect for their views.
"I have written to the company and will be seeking answers as to why they think this behaviour is acceptable and will be urging them to honour their agreement to consider the views of the public before making final decisions."