Taylor Swift Calvin Harris Getty Images

If anyone still held out hope that the relationship between Taylor Swift and Calvin Harris ended amicably, we think it’s a safe bet that you can put that theory to rest.

Harris finally decided to comment on Swift’s new relationship with Tom Hiddleston on Wednesday (July 13) via Twitter by addressing rumors about his recent song with Rihanna, which Swift helped write.

People reports that Swift’s rep confirms Taylor’s input in the songwriting process. “Taylor Swift wrote ‘This Is What You Came For” under the pseudonym Nils Sjoberg.”

RELATED: Hiddleswift: True love or total hoax?

After seeing the story, Harris retweeted the link, confirming it to be true, but that wasn’t all he had to say.

What initially appeared to be a mature and unbothered comment about Swift’s songwriting credit quickly devolved into a semi-aggressive rant about Swift and her new boyfriend.

RELATED: Swiddleston! Taylor Swift moves from Calvin Harris to … James Bond?

Harris accused Swift’s team of trying to make him look bad and urged Taylor to be happy in her new relationship instead of trying to tear her ex-boyfriend down. He even went so far as to drum up the old business with Katy Perry, hinting that Swift’s celebrity drama might have something to do with boredom now that she’s not out on tour.

Swift has not commented on the tweets yet, but this wouldn’t be the first time she’s engaged in a celebrity Twitter fight, so at this point it’s a game of wait and see.

UPDATE: Perry has now responded to the whole kerfuffle with a pointed tweet.