Xfinity Gigabit x2 option has been removed

For the past 2 years I have a Gigabit x2 option on my home internet. 2Gbps download and 240Mbps upload. I bought the specific defined modems Xfinity recommending to get this all fine. Went into Xfinity store to see if I could get a reduction in price on my internet as my contract has expired. [Edited: Language] all round and my internet was downgraded not discount applied. So I went online to re-upgrade to x2 option - its gone. I have been on hours of calls with customer service, been on the portal. Nothing. How is it I had it for 2 years and now that option has disappeared from the offerings?

I do a lot of 4k video work and really need the 240Mbps upload speed but now its 40Mbps (6x slower) even with the right equipment and there seems to be noway to get it back.

HELP!