Shannen Doherty doubles down amid Alyssa Milano feud: 'There is no revisionist history happening'

• TV Holly Marie Combs claims Alyssa Milano had Shannen Doherty fired from Charmed: she told producers 'it's me or her'

Shannen Doherty

has doubled down on claims that

got her fired from

.

The

actress, 52, who is battling stage 4 cancer, was told by her friend and former co-star

to have been let go from The WB witchcraft series as show bosses feared Alyssa would sue for a "hostile workplace environment" if Shannen was not forced out.

During an appearance at Orlando's MegaCon on Sunday (February 4) with her

co-stars Holly, 50, and Rose McGowan, also 50, Shannen was captured on video tearing up as she read a statement about the row, which erupted after she and Holly discussed her exit from

on her podcast.

She said: "Holly and I, we were not mean on the podcast — my podcast,

. In fact, we went in and we edited out anything that we felt would cause more drama.

"We simply told the truth because the truth actually does matter. But we wanted to try to save you, the fans, from heartbreak as much as humanly possible.

"At this point in my life with my health diagnosis — I'm sorry if I start crying — with fighting horrific disease every day of my life, it is also incredibly important to me that the truth actually be told as opposed to the narrative that others put out there for me.

"We told it together,

."

Shannen went on: "There is no revisionist history happening in the truth that I know we told... there is no lateness to set, there is no mediator for months on end. I recall the facts as if I was still living in them "

Holly took to Instagram the day after the event to post a long explanation about why she was "disappointed" in Alyssa's denials over her alleged request to have Shannen ditched from

.

Alyssa has said she felt "sad" about the claims and denied the claims on her Instagram, saying her former co-stars are participating in

.