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Kanye West[1] took advantage of a tech company to advance his Yeezy brand and launch his popular Sunday Service, then left them high and dry ... according to a new suit.

MyChannel, Inc. says it's a black-owned business specializing in video and e-commerce technology. The company claims it linked up with Kanye in Spring 2018 to help Ye maximize revenues for his Yeezy merchandise.

MYC -- repped by attorneys Ben Meiselas and Michael Popok -- alleges Kanye got the company to work around the clock for him for 6 months based on a series of business promises -- including a future $10 MILLION investment -- and estimates it put in 10,000 man-hours and invested $7 mil of its own into the Yeezy project.

According to the suit ... MYC even moved its headquarters -- once to Calabasas and once to Chicago -- all to please Kanye and make the partnership work.

However, after the 6 months, MYC claims it became clear Kanye had no intention of following through on his promises and he cut ties ... but not before allegedly jacking its technology for his newly-launched Sunday Service.

The company alleges Kanye's promises of a partnership were just an effort to fuel his Yeezy brand and steal confidential tech to make millions on Sunday Service ... so now they're suing him over it.

We're told MyChannel's seeking more than $20 million in damages.

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