Bloomberg LP is accusing Comcast of not fulfilling a promise it made during the Federal Communications Commission’s approval process for its merger with NBCUniversal, reports the Los Angeles Times’ Company Town blog.

Bloomberg is threatening to complain to the FCC that Comcast hasn’t lived up to the FCC’s order that Comcast not favor CNBC on the cable lineup. Since the deal closed, Bloomberg TV hasn’t moved closer to CNBC in Comcast’s cable line-ups.

Comcast is arguing that Bloomberg is asking for something that isn’t legally required, noting that it’s not mandated to move Bloomberg TV next to CNBC, and that it hasn’t moved CNBC to a stronger channel position since the deal closed.

If Comcast changes its lineup, "Millions of customers will be subject to disruption and confusion required by massive channel realignments across the country, all to benefit an already thriving, $30 billion media company," Comcast said, according to the piece.