Looks perfectly well to support 8M with port capped to 10238kbps/637kbps with only 14dB/5.6dB attenuation.

Very good line condition. They cancel it probably because they don't want to sell you the line for certain reasons such as keeping the extra port for themselves or too lazy to process it for you at this moment.

I applied 8mb package but the agent inform not supported. so I installed 1mb package. This is my modem data.