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About a week after Elon Musk persuaded Twitter's head of ad sales, Robin Wheeler, not to resign, he changed his mind and fired her, according to reporting by Platformer.

Sources told Casey Newton, who runs the Platformer newsletter that Wheeler had been fired Friday. One source also told Insider Wheeler had been fired but refused to give further details.

Wheeler had handed in her resignation last Thursday along with several other senior leaders but was convinced to stay by Elon Musk, Bloomberg reported. Shortly after Newton broke the news of her firing on Friday, Wheeler posted to social media what appeared to be a confirmation of her departure.

"To the team and my clients….you were always my first and only priority," Wheeler tweeted, adding a salute emoji that has come to be a symbol of departing the company. 

Since Elon Musk acquired the social media platform for $44 billion at the end of October, the social platform has made shocking cuts to its workforce of 7,500 employees. Making good on his promise to investors to cut staffing, Musk quickly started layoffs following the deal's completion. In the weeks since more than 3,700 jobs have been cut.

On Thursday, approximately 1,200 more employees resigned, The New York Times reported. The payroll department and other financial employees departed en masse after Musk asked employees to commit to an "extremely hardcore" Twitter 2.0 with "long hours at high intensity" or quit. 

"It might not seem like a big deal, but I don't think it's appropriate to treat employees like this," one worker told Insider's Jyoti Mann.