Photo: Charles Sykes/Bravo/NBCU Photo Bank via Getty

Thomas Ravenelis speaking out.
On Sunday, the 56-year-oldSouthern Charmstar shared a rare statement on Instagram to address what he claims are falsehoods stemming from the show — before deleting his post.
“Lot of lies on #SouthernCharm,” he wrote. “For example, I am sadistic [because] I requested 3 drugs tests of[Kathryn Dennis]per week. Fact is I requested only 3 tests over the course of an entire year.”
Bravo and Haymaker, the production company behindSouthern Charm, launched an investigation into the claims, saying they “take allegations like these very seriously.”
“Once all the information is gathered and carefully reviewed, appropriate action will be taken,” the network said in a statement.
No further update into the investigation has been provided, and a source close to the network previously told PEOPLE that “no decision has been made yet” aboutfiring himfrom the reality show.
RELATED VIDEO:Southern Charm‘s Thomas Ravenel Accused of Sexual Assault, Allegedly Paid Accuser $200,000
Last week, a source told PEOPLE that Ravenel’s costars haveall but cut ties with himsince production on season 5 wrapped. (Representatives for Bravo had no comment.)
“He doesn’t have friendships with the [main] cast anymore — everyone is done,” the source said. “They’re disgusted with him and the way he and Ashley treated Kathryn this season. His eye-opening behavior and the drama surrounding those allegations caused a huge wedge in his friendships. There’s too much dishonesty there, too much manipulation. They’ve all just been keeping their distance.”
The source said that Ravenel has “been like a hermit, staying close to home at his Brookland Plantation.”
“He’s completely distraught over the allegations and what’s happened with the show,” the source said. “He’sbounced back from scandal before, but this is much harder now that he has kids.”
source: people.com