Two weeks before he got locked up, very online discount apparel company Fashion Nova entered into a deal with Tekashi 6ix9ine.

6ix9ine got a $225,000 advance to promote Fashion Nova on his social media.  

Now Fashion Nova is suing Tekashi for $2.25 million, arguing that the troll rapper deceived them by hiding his criminal activity and then reneged on a promise to return the advance after he was arrested.  

Furthermore, FN says that 6ix9ine's testimony against his fellow Nine Treys destroyed his ability to be a good ambassador for the brand.

6ix9ine, who expected to be released from prison on August 2, has not commented on the suit.

Tekashi signed a $10 million deal with his old record label 10K projects late last year.